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fx-83GT PLUS
fx-85GT PLUS
User’s Guide
CASIO Worldwide Education Website
http://edu.casio.com
CASIO EDUCATIONAL FORUM
http://edu.casio.com/forum/
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Inhalt der Seiten


  • Page 1

    E

    fx-83GT PLUS
    fx-85GT PLUS
    User’s Guide

    CASIO Worldwide Education Website

    http://edu.casio.com
    CASIO EDUCATIONAL FORUM

    http://edu.casio.com/forum/



  • Page 2

    Contents
    Important Information ............................................................. 2
    Sample Operations.................................................................. 2
    Initializing the Calculator ........................................................ 2
    Safety Precautions .................................................................. 2
    Handling Precautions.............................................................. 2
    Removing the Hard Case ........................................................ 3
    Turning Power On and Off ...................................................... 3
    Adjusting Display Contrast .................................................... 3
    Key Markings ........................................................................... 3
    Reading the Display ................................................................ 4
    Using Menus ............................................................................ 5
    Specifying the Calculation Mode ........................................... 5
    Configuring the Calculator Setup .......................................... 5
    Inputting Expressions and Values ......................................... 7
    Recurring Decimal Calculations ............................................ 9
    Toggling Calculation Results ............................................... 13
    Basic Calculations ................................................................ 14
    Prime Factorization ............................................................... 17
    Function Calculations ........................................................... 18
    Statistical Calculations (STAT) ............................................. 21
    Creating a Number Table from a Function (TABLE) ........... 24
    Using VERIFY (VERIF)........................................................... 25
    Calculation Ranges, Number of Digits,
    and Precision ......................................................................... 26
    Errors...................................................................................... 28
    Before Assuming Malfunction of the Calculator... ............. 29
    Replacing the Battery............................................................ 30
    Specifications ........................................................................ 30
    Frequently Asked Questions................................................ 30

    E-1



  • Page 3

    Important Information
    • The displays and illustrations (such as key markings) shown in this User’s
    Guide are for illustrative purposes only, and may differ somewhat from the
    actual items they represent.
    • The contents of this manual are subject to change without notice.
    • In no event shall CASIO Computer Co., Ltd. be liable to anyone for special,
    collateral, incidental, or consequential damages in connection with or
    arising out of the purchase or use of this product and items that come with
    it. Moreover, CASIO Computer Co., Ltd. shall not be liable for any claim of
    any kind whatsoever by any other party arising out of the use of this product
    and the items that come with it.
    • Be sure to keep all user documentation handy for future reference.

    Sample Operations
    Sample operations in this manual are indicated by a
    icon. Unless
    specifically stated, all sample operations assume that the calculator is in its
    initial default setup. Use the procedure under “Initializing the Calculator” to
    return the calculator to its initial default setup.
    For information about the , 1, B, and * marks that are shown
    in the sample operations, see “Configuring the Calculator Setup”.

    Initializing the Calculator
    Perform the following procedure when you want to initialize the calculator and
    return the calculation mode and setup to their initial default settings. Note that
    this operation also clears all data currently in calculator memory.
    (CLR)(All)(Yes)

    Safety Precautions
    Battery
    • Keep batteries out of the reach of small children.
    • Use only the type of battery specified for this calculator in this manual.

    Handling Precautions
    • Even if the calculator is operating normally, replace the battery at least
    once every two years (R03 (UM-4)), or three years (LR44 (GPA76)).
    A dead battery can leak, causing damage to and malfunction of the
    calculator. Never leave a dead battery in the calculator. Do not try using
    the calculator while the battery is completely dead (fx-85GT PLUS).
    • The battery that comes with the calculator discharges slightly during
    shipment and storage. Because of this, it may require replacement
    sooner than the normal expected battery life.
    • Do not use an oxyride battery* or any other type of nickel-based
    primary battery with this product. Incompatibility between such
    batteries and product specifications can result in shorter battery life
    and product malfunction.
    • Avoid use and storage of the calculator in areas subjected to
    temperature extremes, and large amounts of humidity and dust.

    E-2



  • Page 4

    • Do not subject the calculator to excessive impact, pressure, or
    bending.
    • Never try to take the calculator apart.
    • Use a soft, dry cloth to clean the exterior of the calculator.
    • Whenever discarding the calculator or batteries, be sure to do so in
    accordance with the laws and regulations in your particular area.
    * Company and product names used in this manual may be registered
    trademarks or trademarks of their respective owners.

    Removing the Hard Case
    Before using the calculator, slide its hard
    case downwards to remove it, and then affix
    the hard case to the back of the calculator as
    shown in the illustration nearby.

    Turning Power On and Off
    Press  to turn on the calculator.
    Press (OFF) to turn off the calculator.
    Auto Power Off
    Your calculator will turn off automatically if you do not perform any operation
    for about 10 minutes. If this happens, press the  key to turn the calculator
    back on.

    Adjusting Display Contrast
    Display the CONTRAST screen by performing the following key operation:
    (SETUP)A(;CONT). Next, use B and C to adjust
    contrast. After the setting is the way you want, press .
    Important: If adjusting display contrast does not improve display readability,
    it probably means that battery power is low. Replace the battery.

    Key Markings
    Pressing the  or # key followed by a second
    key performs the alternate function of the second key.
    The alternate function is indicated by the text printed
    above the key.
    The following shows what the different colors of the
    alternate function key text mean.

    Alternate function

    sin–1 D

    s
    Keycap function

    If key marking text
    is this color:

    It means this:

    Yellow

    Press  and then the key to access the
    applicable function.

    Red

    Press # and then the key to input the
    applicable variable, constant, or symbol.

    E-3



  • Page 5

    Reading the Display
    The display of the calculator shows expressions you input, calculation results,
    and various indicators.
    Input expression

    Indicators
    Math

    Math

    Calculation result

    • If a  indicator appears on the right side of the calculation result, it means
    the displayed calculation result continues to the right. Use C and B to
    scroll the calculation result display.
    • If a E indicator appears on the right side of the input expression, it means
    the displayed calculation continues to the right. Use C and B to scroll the
    input expression display. Note that if you want to scroll the input expression
    while both the  and E indicators are displayed, you will need to press 
    first and then use C and B to scroll.
    Display indicators
    This
    indicator:

    Means this:

    S

    The keypad has been shifted by pressing the  key. The
    keypad will unshift and this indicator will disappear when
    you press a key.

    A

    The alpha input mode has been entered by pressing the
    # key. The alpha input mode will be exited and this
    indicator will disappear when you press a key.

    M

    There is a value stored in independent memory.

    STO

    The calculator is standing by for input of a variable name to
    assign a value to the variable. This indicator appears after
    you press B(STO).

    RCL

    The calculator is standing by for input of a variable name to
    recall the variable’s value. This indicator appears after you
    press B.

    STAT

    The calculator is in the STAT Mode.

    

    The default angle unit is degrees.

    

    The default angle unit is radians.

    

    The default angle unit is grads.

    FIX

    A fixed number of decimal places is in effect.

    SCI

    A fixed number of significant digits is in effect.

    Math

    Natural Display is selected as the display format.

    >

    Calculation history memory data is available and can be
    replayed, or there is more data above/below the current
    screen.

    Disp

    The display currently shows an intermediate result of a
    multi-statement calculation.

    E-4



  • Page 6

    Important: For some type of calculation that takes a long time to execute,
    the display may show only the above indicators (without any value) while it
    performs the calculation internally.

    Using Menus
    Some of the calculator’s operations are performed using menus. Pressing
     or E, for example, will display a menu of applicable functions.
    The following are the operations you should use to navigate between
    menus.
    • You can select a menu item by pressing the number key that corresponds
    to the number to its left on the menu screen.
    • The  indicator in the upper right corner of a menu means there is another
    menu below the current one. The > indicator means another menu above.
    Use A and D to switch between menus.
    • To close a menu without selecting anything, press .

    Specifying the Calculation Mode
    When you want to perform this type of
    operation:

    Perform this key
    operation:

    General calculations

    (COMP)

    Statistical and regression calculations

    (STAT)

    Generation of a number table based on an
    expression

    (TABLE)

    Verify a calculation

    (VERIF)

    Note: The initial default calculation mode is the COMP Mode.

    Configuring the Calculator Setup
    First perform the following key operation to display the setup menu:
    (SETUP). Next, use A and D and the number keys to configure
    the settings you want.
    Underlined ( ___ ) settings are initial defaults.
    MthIO LineIO Specifies the display format.
    Natural Display (MthIO) causes fractions,
    irrational numbers, and other expressions to be
    displayed as they are written on paper.

    

    MthIO: Selects MathO or LineO. MathO displays
    input and calculation results using the same format as they are written on
    paper. LineO displays input the same way as MathO, but calculation results
    are displayed in linear format.
    Linear Display (LineIO) causes fractions and
    other expressions to be displayed in a single
    line.
    Note: • The calculator switches to Linear Display automatically whenever
    you enter the STAT Mode. • In this manual, the  symbol next to a
    sample operation indicates Natural Display (MathO), while the 1 symbol
    indicates Linear Display.

    E-5



  • Page 7

    Deg Rad Gra Specifies degrees, radians or grads as the angle
    unit for value input and calculation result display.
    Note: In this manual, the B symbol next to a sample operation indicates
    degrees, while the * symbol indicates radians.
    Fix Sci Norm
    Specifies the number of digits for display of a
    calculation result.
    Fix: The value you specify (from 0 to 9) controls the number of decimal
    places for displayed calculation results. Calculation results are rounded off
    to the specified digit before being displayed.
    Example: 1 100 ÷ 7 = 14.286 (Fix 3)
    14.29 (Fix 2)
    Sci: The value you specify (from 1 to 10) controls the number of significant
    digits for displayed calculation results. Calculation results are rounded off to
    the specified digit before being displayed.
    Example: 1 1 ÷ 7 = 1.4286 s 10–1 (Sci 5)
    1.429 s 10–1 (Sci 4)
    Norm: Selecting one of the two available settings (Norm 1, Norm 2)
    determines the range in which results will be displayed in non-exponential
    format. Outside the specified range, results are displayed using exponential
    format.
    Norm 1: 10–2  |x|, |x| > 1010 Norm 2: 10–9  |x|, |x| > 1010
    Example: 1 1 ÷ 200 = 5 s 10–3 (Norm 1)
    0.005 (Norm 2)
    Aab/c A d/c Specifies either mixed fraction (ab/c) or improper
    fraction (d/c) for display of fractions in calculation results.
    ASTAT ON ; OFF Specifies whether or not to display a FREQ
    (frequency) column in the STAT Mode Stat Editor.
    ARdec ON ; OFF Specifies whether or not to display calculation
    results using recurring decimal form.
    ADisp Dot ; Comma Specifies whether to display a dot or
    a comma for the calculation result decimal point. A dot is always displayed
    during input.
    Note: When dot is selected as the decimal point, the separator for multiple
    results is a comma (,). When comma is selected, the separator is a
    semicolon (;).
    A;CONT
    Contrast” for details.

    Adjusts display contrast. See “Adjusting Display

    Initializing Calculator Settings
    Perform the following procedure to initialize the calculator, which returns the
    calculation mode to COMP and returns all other settings, including setup
    menu settings, to their initial defaults.
    (CLR)(Setup)(Yes)

    E-6



  • Page 8

    Inputting Expressions and Values
    Basic Input Rules
    Calculations can be input in the same form as they are written. When you
    press  the priority sequence of the input calculation will be evaluated
    automatically and the result will appear on the display.
    4 ssin30 s(30 + 10 s3) = 120
    4 Q 30   30 10 3 
    2

    *

    *1

    

    *3

    *1 Input of the closing parenthesis is required for sin, sinh, and other functions
    that include parentheses.
    *2 These multiplication symbols (s) can be omitted. A multiplication symbol
    can be omitted when it occurs immediately before an opening parenthesis,
    immediately before sin or other function that includes parentheses,
    immediately before the Ran# (random number) function, or immediately
    before a variable (A, B, C, D, E, F, M, X, Y), P or e.
    3
    * The closing parenthesis immediately before the  operation can be
    omitted.
    Input example omitting *2 and *3 operations in the above
    example.
    
    4 Q 30  30 10 3 

    Note: • If the calculation becomes longer than the screen width during
    input, the screen will scroll automatically to the right and the ; indicator will
    appear on the display. When this happens, you can scroll back to the left by
    using B and C to move the cursor. • When Linear Display is selected,
    pressing D will cause the cursor to jump to the beginning of the calculation,
    while A will jump to the end. • When Natural Display is selected, pressing
    C while the cursor is at the end of the input calculation will cause it to jump
    to the beginning, while pressing B while the cursor is at the beginning will
    cause it to jump to the end. • You can input up to 99 bytes for a calculation.
    Each numeral, symbol, or function normally uses one byte. Some functions
    require three to 13 bytes. • The cursor will change shape to I when there are
    10 bytes or less of allowed input remaining. If this happens, end calculation
    input and then press .

    Calculation Priority Sequence
    The priority sequence of input calculations is evaluated in accordance with the
    rules below. When the priority of two expressions is the same, the calculation
    is performed from left to right.
    1st

    Parenthetical expressions

    2nd

    Functions that require an argument to the right and a closing
    parenthesis “)” following the argument.

    3rd

    Functions that come after the input value (x2, x3, x–1, x!, °’ ”, °, r, g,
    %), powers (x9), roots ()

    4th

    Fractions

    E-7



  • Page 9

    5th

    Negative sign (–)
    Note: When squaring a negative value (such as –2), the value
    being squared must be enclosed in parentheses ( 2 7;
    ). Since x2 has a higher priority than the negative sign,
    inputting 2 7 would result in the squaring of 2 and then
    appending a negative sign to the result. Always keep the priority
    sequence in mind, and enclose negative values in parentheses
    when required.

    6th

    STAT Mode estimated values (K, L, K1, K2)

    7th

    Multiplication where the multiplication sign is omitted

    8th

    Permutation (nPr), combination (nCr)

    9th

    Multiplication, division (s, ÷)

    10th

    Addition, subtraction (+, –)

    Inputting with Natural Display
    Selecting Natural Display makes it possible to input and display fractions and
    certain functions (log, x2, x3, x9, , , , x−1, 109, e9, Abs) just as they
    are written in your textbook.
    2+'
    2
    1+'
    2

    
    

     2 2 CC 1 2 

    Important: • Certain types of expressions can cause the height of a
    calculation formula to be greater than one display line. The maximum
    allowable height of a calculation formula is two display screens (31 dots s 2).
    Further input will become impossible if the height of the calculation you are
    inputting exceeds the allowable limit. • Nesting of functions and parentheses
    is allowed. Further input will become impossible if you nest too many functions
    and/or parentheses. If this happens, divide the calculation into multiple parts
    and calculate each part separately.
    Note: When you press  and obtain a calculation result using Natural
    Display, part of the expression you input may be cut off. If you need to view
    the entire input expression again, press  and then use B and C to
    scroll the input expression.

    Using Values and Expressions as Arguments
    (Natural Display only)
    A value or an expression that you have already input can be used as the
    7
    , for example, you can make
    argument of a function. After you have input
    6
    7
    it the argument of , resulting in
    .
    6

    '

    To input 1 + 7 and then change it to 1 +
    6

    7
    '
    6

    
    

    1 76
    

    BBBB)(INS)

    E-8



  • Page 10

    



    As shown above, the value or expression to the right of the cursor after
    )(INS) are pressed becomes the argument of the function that is
    specified next. The range encompassed as the argument is everything up
    to the first open parenthesis to the right, if there is one, or everything up to
    the first function to the right (sin(30), log2(4), etc.)
    This capability can be used with the following functions:  ,  ,
    (), :(), 7(), , , (), .

    Overwrite Input Mode (Linear Display only)
    You can select either insert or overwrite as the input mode, but only while
    Linear Display is selected. In the overwrite mode, text you input replaces the
    text at the current cursor location. You can toggle between the insert and
    overwrite modes by performing the operations: )(INS). The cursor
    appears as “I” in the insert mode and as “ ” in the overwrite mode.
    Note: Natural Display always uses the insert mode, so changing display
    format from Linear Display to Natural Display will automatically switch to
    the insert mode.

    Correcting and Clearing an Expression
    To delete a single character or function: Move the cursor so it is directly to
    the right of the character or function you want to delete, and then press ).
    In the overwrite mode, move the cursor so it is directly under the character
    or function you want to delete, and then press ).
    To insert a character or function into a calculation: Use B and C to
    move the cursor to the location where you want to insert the character or
    function and then input it. Be sure always to use the insert mode if Linear
    Display is selected.
    To clear all of the calculation you are inputting: Press .

    Recurring Decimal Calculations
    Your calculator uses a recurring decimal when you input a value. Calculation
    results also can be displayed using recurring decimal form whenever
    applicable.

    Inputting a Recurring Decimal


    When inputting a recurrent decimal, press 7( I ) before inputting its
    period (repetend) and then input the period up to the ending value. To input
    • •
    the recurring decimal 0.909090.... (0.90), perform the following operation:

    “0
    7( I ) 90”.
    Important: • If the value starts with an integer part (like: 12.3123123...), do


    not include the integer part when inputting the period (12.312). • Recurring
    decimal input is possible only when Natural Display is selected.


    To input 0.33333... (0.3 )

    

    Math

    0


    E-9



  • Page 11

    Math



    7( I )
    Math

    3





    

    To input 1.428571428571... (1.4 28571 )

    Math



    1
    7( I )
    Math

    428571









    To calculate 1.021 + 2.312

    

    Math



    1
    7( I ) 021C

    2
    7( I ) 312
    Calculation result displayed as recurring
    decimal value:

    Math

    5

    Note: • You can specify up to 14 decimal places for the recurring decimal
    period. If you input more than 14 decimal places, the value will be treated as
    a terminating decimal and not a recurring decimal. • Recurring decimal value
    input can be performed regardless of the Rdec setting on the setup menu.

    Displaying a Calculation Result as a Recurring
    Decimal Value
    Calculation results that can be displayed as recurring decimal values will be
    displayed as such when ON is selected for the Rdec setting on the setup
    menu. Pressing the 5 key will cycle between the available calculation result
    formats as shown below.
    Fraction

    Recurring Decimal

    Decimal Value According to Display (Norm, Fix, Sci) Settings
    Or
    Decimal Value According to Display (Norm, Fix, Sci) Settings
    Recurring Decimal

    E-10

    Fraction



  • Page 12

    1 = 0.1• 42857• = 0.1428571429 (Norm 1)
    7

    
    Math

    17
    Math

    5

    Display as recurring decimal:

    Math

    Decimal value according to Norm 1 setting: 5
    Math

    Return to initial display format (fraction):

    5



    1 ÷ 7 = 1 = 0.142857 = 0.1428571429 (Norm 1)
    7

    
    Math

    1  7 
    Math

    5

    Display as fraction:

    Math

    5

    Display as recurring decimal:

    Math

    Return to initial display format (Norm 1):

    5

    1 = 0.1• 42857• = 0.1428571429 (Norm 1)
    7
    17

    5

    Display as recurring decimal:

    Decimal value according to Norm 1 setting: 5

    E-11

    1



  • Page 13

    Return to initial display format (fraction):

    5



    1 ÷ 7 = 0.1428571429 (Norm 1) = 0.142857 = 1
    7

    1

    17

    Display as fraction:

    5

    Display as recurring decimal:

    5

    Return to initial display format (Norm 1):

    5

    Conditions for Displaying a Calculation Result as a
    Recurring Decimal
    If a calculation result satisfies the following conditions, pressing 5 will
    display it as a recurring decimal value.
    • The total number of digits used in the mixed fraction (including integer,
    numerator, denominator, and separator symbol) must be no more than
    10.
    • The data size of value to be displayed as the recurring decimal must be no
    larger than 99 bytes. Each value and the decimal point require one byte,
    and each digit of the period requires one byte. The following, for example,
    would require of total of 8 bytes (4 bytes for the values, 1 byte for the decimal


    point, 3 bytes for the period): 0.123
    Note: For information about switching the display format of a calculation
    result when OFF is selected for the Rdec setting on the setup menu, see
    “Toggling Calculation Results”.

    Recurring Decimal Examples


    • •

    • •

    0.3 + 0.4 5 = 0.78

    


    Math

    0
    7( I ) 3 C

    0
    7( I ) 45 5






    1.6 + 2.8 = 4.5

    


    1
    7( I ) 6 C

    2
    7( I ) 8 5

    E-12

    Math



  • Page 14





    To confirm the following: 0.123 = 123 , 0.1234 = 1234 ,
    999
    9999


    12345
    
    0.12345 =
    99999

    Math

    123  999 
    Math

    5
    Math

    1234  9999 
    Math

    5
    Math

    12345  99999 
    Math

    5

    Toggling Calculation Results
    While Natural Display is selected, each press of 5 will toggle the currently
    displayed calculation result between its fraction form and decimal form, its
     form and decimal form, or its P form and decimal form.
    P ÷ 6 = 1  = 0.5235987756
    6
    
    (P) 6 

    
    1
    6

    ('
    2 + 2) s '
    3 ='
    6 + 2'
    3 = 5.913591358
     2 C 2  3  '
    6 + 2'
    3

    f

    0.5235987756

    
    f

    5.913591358

    While Linear Display is selected, each press of 5 will toggle the currently
    displayed calculation result between its decimal form and fraction form.
    1 ÷ 5 = 0.2 = 1
    5
    15
    1 – 4 = 1 = 0.2
    5
    5
    145

    1

    0.2 f

    1Y5

    1Y5 f

    0.2

    1

    E-13



  • Page 15

    Important: • Depending on the type of calculation result that is on the display
    when you press the 5 key, the conversion process may take some time
    to perform. • With certain calculation results, pressing the 5 key will not
    convert the displayed value. • When ON is selected for Rdec on the setup
    menu, pressing 5 will switch the calculation result to recurring decimal form.
    For details, see “Recurring Decimal Calculations”. • You cannot switch from
    decimal form to mixed fraction form if the total number of digits used in the
    mixed fraction (including integer, numerator, denominator, and separator
    symbols) is greater than 10.
    Note: With Natural Display (MathO), pressing  instead of  after
    inputting a calculation will display the calculation result in decimal form.
    Pressing 5 after that will switch the calculation result to recurring decimal
    form, fraction form or P form. The  form of the result will not appear in
    this case.

    Basic Calculations
    Fraction Calculations
    Note that the input method for fractions is different, depending upon whether
    you are using Natural Display or Linear Display.
    2 + 1 = 7 
    3
    2
    6

    2  3 C 1  2 
    or  2 A 3 C  1 A 2 

    1
    4−3

    1 = 1 
    2
    2

    23 12
    4 () 3 C 1 A 2 

    1

    4312

    7
    6
    7
    6
    7Y6
    1
    2
    1Y2

    Note: • Mixing fractions and decimal values in a calculation while Linear
    Display is selected will cause the result to be displayed as a decimal value.
    • Fractions in calculation results are displayed after being reduced to their
    lowest terms.
    To switch a calculation result between improper fraction and mixed
    fraction form: Perform the following key operation: 5()
    To switch a calculation result between fraction and decimal form:
    Press 5.

    Percent Calculations
    Inputting a value and pressing (%) causes the input value to
    become a percent.
    150 20 (%)

    30

    Calculate what percentage of 880 is 660. (75%)
    660  880 (%)

    75

    Increase 2500 by 15%. (2875)
    2500 2500 15 (%)

    2875

    Discount 3500 by 25%. (2625)
    3500 3500 25 (%)

    2625

    150 s20% = 30

    E-14



  • Page 16

    Degree, Minute, Second (Sexagesimal) Calculations
    Performing an addition or subtraction operation between sexagesimal values,
    or a multiplication or division operation between a sexagesimal value and a
    decimal value will cause the result to be displayed as a sexagesimal value.
    You also can convert between sexagesimal and decimal. The following
    is the input format for a sexagesimal value: {degrees}  {minutes} 
    {seconds} .
    Note: You must always input something for the degrees and minutes, even
    if they are zero.
    2°20´30˝ + 39´30˝ = 3°00´00˝
    2  20  30  0  39  30 

    3°0´0˝

    Convert 2°15´18˝ to its decimal equivalent.
    2  15  18  2°15´18˝
    (Converts sexagesimal to decimal.) 
    2.255
    (Converts decimal to sexagesimal.)  2°15´18˝

    Multi-Statements
    You can use the colon character (:) to connect two or more expressions and
    execute them in sequence from left to right when you press .
    3+3:3s3

    3 3#

    (:) 3 3 
    

    6
    9

    Using Engineering Notation
    A simple key operation transforms a displayed value to engineering
    notation.
    Transform the value 1234 to engineering notation, shifting the
    decimal point to the right.
    1234 
    1234
    '
    1.234×103
    '
    1234×100
    Transform the value 123 to engineering notation, shifting the decimal
    point to the left.
    123 
    123
    '(k)
    0.123×103
    '(k) 0.000123×106

    Calculation History
    In the COMP Mode, the calculator remembers up to approximately 200 bytes
    of data for the newest calculation. You can scroll through calculation history
    contents using D and A.
    1 1
    2 2

    1+1=2
    2+2=4

    E-15

    2
    4



  • Page 17

    6
    4
    2

    3 3
    (Scrolls back.) D
    (Scrolls back again.) D

    3+3=6

    Note: Calculation history data is all cleared whenever you press , when
    you change to a different calculation mode, when you change the display
    format, or whenever you perform any reset operation.

    Replay
    While a calculation result is on the display, you can press B or C to edit
    the expression you used for the previous calculation.
    4 × 3 + 2.5 = 14.5 1
    4 3 2.5 
    4 × 3 − 7.1 = 4.9
    (Continuing) B)))) 7.1 

    14.5
    4.9

    Note: If you want to edit a calculation when the  indicator is on the right
    side of a calculation result display (see “Reading the Display”), press 
    and then use B and C to scroll the calculation.

    Answer Memory (Ans)
    The last calculation result obtained is stored in Ans (answer) memory.
    Ans memory contents are updated whenever a new calculation result is
    displayed.
    To divide the result of 3 s 4 by 30 1
    3 4
    (Continuing)

    123 + 456 = 579 
    789 – 579 = 210
    (Continuing)

     30 

    123 456 
    

    789 

    Variables (A, B, C, D, E, F, X, Y)
    Your calculator has eight preset variables named A, B, C, D, E, F, X, and Y. You
    can assign values to variables and also use the variables in calculations.
    To assign the result of 3 + 5 to variable A
    3 5 B(STO)E(A)

    8

    To multiply the contents of variable A by 10
    (Continuing) #E(A) 10 

    80

    BE(A)

    8

    0 B(STO)E(A)

    0

    To recall the contents of variable A
    To clear the contents of variable A

    E-16

    (Continuing)



  • Page 18

    Independent Memory (M)
    You can add calculation results to or subtract results from independent
    memory. The “M” appears on the display when there is any value other than
    zero stored in independent memory.
    To clear the contents of M
    To add the result of 10 s 5 to M

    0

    10 5 J

    50

    10 5 J(M–)

    15

    BJ(M)

    35

    (Continuing)

    To subtract the result of 10 + 5 from M
    (Continuing)
    To recall the contents of M

    0 B(STO)J(M)

    (Continuing)

    Note: Variable M is used for independent memory.

    Clearing the Contents of All Memories
    Ans memory, independent memory, and variable contents are retained even
    if you press , change the calculation mode, or turn off the calculator.
    Perform the following procedure when you want to clear the contents of
    all memories.
    (CLR)(Memory)(Yes)

    Prime Factorization
    In the COMP Mode, you can factor a positive integer up to 10 digits into
    prime factors up to three digits.
    To perform prime factorization on 1014
    1014 
    4(FACT)
    When you perform prime factorization on a value that includes a factor that
    is prime number with more than three digits, the part that cannot be factored
    will be enclosed in parentheses on the display.
    To perform prime factorization on 4104676 (= 22 s 10132)
    4(FACT)
    Any one of the following operations will exit prime factorization result
    display.
    • Pressing 4(FACT) or .
    • Pressing any of the following keys:
    or 4.
    • Using the setup menu to change the angle unit setting (Deg, Rad, Gra) or
    the display digits setting (Fix, Sci, Norm).
    Note: • You will not be able to execute prime factorization while a decimal
    value, fraction, or negative value calculation result is displayed. Trying to
    do so will cause a math error (Math ERROR). • You will not be able to
    execute prime factorization while the result of a calculation that uses Pol,
    Rec is displayed.

    E-17



  • Page 19

    Function Calculations
    For actual operations using each function, see the “Examples” section
    following the list below.
    : P is displayed as 3.141592654, but P = 3.14159265358980 is used for
    internal calculations.

    e : e is displayed as 2.718281828, but e = 2.71828182845904 is used for
    internal calculations.
    sin, cos, tan, sin−1, cos−1, tan−1 : Trigonometric functions. Specify the angle
    unit before performing calculations. See 1 .
    sinh, cosh, tanh, sinh−1, cosh−1, tanh−1 : Hyperbolic functions. Input a
    function from the menu that appears when you press E. The angle unit
    setting does not affect calculations. See 2 .
    °, r, g : These functions specify the angle unit. ° specifies degrees, r radians,
    and g grads. Input a function from the menu that appears when you perform
    the following key operation: (DRG). See 3 .

    ,  :

    Exponential functions. Note that the input method is different
    depending upon whether you are using Natural Display or Linear Display.
    See 4 .

    log: Logarithmic function. Use the : key to input logab as log (a, b). Base
    10 is the default setting if you do not input anything for a. The  key also
    can be used for input, but only while Natural Display is selected. In this
    case, you must input a value for the base. See 5 .
    ln: Natural logarithm to base e. See

    6.

    x2, x3, x9, , , , x−1 : Powers, power roots, and reciprocals. Note
    that the input methods for x9, , , and  are different depending upon
    whether you are using Natural Display or Linear Display. See

    7.

    Note: The following functions cannot be input in consecutive sequence: x2,
    x3, x9, x−1. If you input 277, for example, the final 7 will be ignored. To
    2
    input 22 , input 27, press the B key, and then press 7().
    Pol, Rec : Pol converts rectangular coordinates to polar coordinates, while
    Rec converts polar coordinates to rectangular coordinates. See 8 .
    Pol(x, y) = (r, Ƨ)

    Rectangular
    Coordinates (Rec)

    Rec(r, Ƨ) = (x, y)

    Polar
    Coordinates (Pol)

    x ! : Factorial function. See

    9

    Specify the angle unit before
    performing calculations.
    The calculation result for r and Ƨ
    and for x and y are each assigned
    respectively to variables X and Y.
    Calculation result Q is displayed
    in the range of −180° Q 
    180°.

    .

    Abs : Absolute value function. Note that the input method is different
    depending upon whether you are using Natural Display or Linear Display.
    See 10 .
    Ran# : Generates a 3-digit pseudo random number that is less than 1. The
    result is displayed as a fraction when Natural Display is selected. See 11 .

    E-18



  • Page 20

    RanInt# : For input of the function of the form RanInt#(a, b), which generates
    a random integer within the range of a to b. See 12 .

    nPr, nCr : Permutation (nPr) and combination (nCr) functions. See

    13 .

    Rnd : The argument of this function is made a decimal value and then rounded
    in accordance with the current number of display digits setting (Norm, Fix, or
    Sci). With Norm 1 or Norm 2, the argument is rounded off to 10 digits. With
    Fix and Sci, the argument is rounded off to the specified digit. When Fix 3
    is the display digits setting, for example, the result of 10 ÷ 3 is displayed
    as 3.333, while the calculator maintains a value of 3.33333333333333 (15
    digits) internally for calculation. In the case of Rnd(10÷3) = 3.333 (with Fix
    3), both the displayed value and the calculator’s internal value become
    3.333. Because of this a series of calculations will produce different results
    depending on whether Rnd is used (Rnd(10÷3) s 3 = 9.999) or not used (10
    ÷ 3 s3 = 10.000). See 14 .
    Note: Using functions can slow down a calculation, which may delay display
    of the result. Do not perform any subsequent operation while waiting for the
    calculation result to appear. To interrupt an ongoing calculation before its
    result appears, press .

    Examples
    1B

    Q 30 

    sin−10.5 = 30° 1B

    Q(sin−1) 0.5 

    1 sin 30°= 0.5

    2 sinh 1 = 1.175201194

    0.5
    30

    E@(sinh) 1  1.175201194

    0

    ED(cosh−1) 1 

    cosh–1 1 = 0

    3 P/2 radians = 90°, 50 grads = 45°

    B

    
    (P) 2 (DRG)A(r)
    50 (DRG)B(g)

    90
    45

    4 To calculate e5s2 to three significant digits (Sci 3)
    (SETUP)(Sci)
    
    1

    7() 5 C 2 
    7() 5  2 

    2.97×102
    2.97×102

    : 1000 

    3
    4
    4

    5 log101000 = log 1000 = 3
    log216 = 4
    

    : 2 (,) 16 
     2 C 16 

    6 To calculate ln 90 (= loge 90) to three significant digits (Sci 3)
    7 90 

    4.50×100

    1.2 10  3 

    1200
    16
    15625
    2
    2

    (SETUP)(Sci)
    7 1.2 s103 = 1200 
    2+2

    (1+1) = 16
    (52)3 = 15625
    5
    32 = 2

      1 1  2 2 
     5 V
    
    
    () 5 C 32 
    1
    5() 32 

    E-19



  • Page 21

    2 = 4.242640687...) to three decimal
    To calculate '
    2 × 3 (= 3'
    places (Fix 3)
    3'
    (SETUP)(Fix) 
    2 C 3 
    2
    
    4.243
    1
    2  3 
    4.243
    2,'
    2 ) to polar coordinates
    8 To convert rectangular coordinates ('
    B
      (Pol) 2 C(,) 2 C r=2,Ƨ=45
    1
     (Pol) 2 (,) 2 
    r= 2

    

     

    

    

    Ƨ= 45

    2 , 45°) to rectangular coordinates
    To convert polar coordinates ('
    B
    
    (Rec) 2 C(,) 45 
    X=1, Y=1
    9 (5 + 3) ! = 40320

     5 3  (x!) 

    40320

     2 7 C 2 
     2 7  2 

    10
    10

    10 |2 – 7| s 2 = 10
    
    1

    11 To obtain three random three-digit integers
    1000 
    (Ran#)
    
    

    459
    48
    117

    (Results shown here are for illustrative purposes only. Actual results will differ.)

    12 To generate random integers in the range of 1 to 6

    2
    6
    1

    #
    (RanInt) 1 (,) 6 
    
    

    (Results shown here are for illustrative purposes only. Actual results will differ.)

    13 To determine the number of permutations and combinations
    possible when selecting four people from a group of 10
    Permutations:
    Combinations:

    10  (nPr) 4 
    10 (nCr) 4 

    5040
    210

    14 To perform the following calculations when Fix 3 is selected for the
    number of display digits: 10 ÷ 3 s 3 and Rnd(10 ÷ 3) s 3 1
    (SETUP)(Fix)
    10  3 3 
    (Rnd) 10  3  3 

    E-20

    10.000
    9.999



  • Page 22

    Statistical Calculations (STAT)
    To start a statistical calculation, perform the key operation (STAT)
    to enter the STAT Mode and then use the screen that appears to select the
    type of calculation you want to perform.
    To select this type of statistical calculation:
    (Regression formula shown in parentheses) Press this key:
    (1-VAR)

    Single-variable (X)

    Paired-variable (X, Y), linear regression ( y = A + Bx) (A+BX)
    Paired-variable (X, Y), quadratic regression
    ( _+CX2)
    ( y = A + Bx + Cx2)
    Paired-variable (X, Y), logarithmic regression
    (ln X)
    ( y = A + Blnx)
    Paired-variable (X, Y), e exponential regression
    ( y = AeBx) (e^X)
    Paired-variable (X, Y), ab exponential regression
    (A•B^X)
    ( y = ABx)
    Paired-variable (X, Y), power regression

    ( y = AxB) (A•X^B)

    Paired-variable (X, Y), inverse regression
    (1/X)
    ( y = A + B/x)
    Pressing any of the above keys ( to ) displays the Stat Editor.
    Note: When you want to change the calculation type after entering the
    STAT Mode, perform the key operation (STAT)(Type) to display
    the calculation type selection screen.

    Inputting Data
    Use the Stat Editor to input data. Perform the following key operation to
    display the Stat Editor: (STAT)(Data).
    The Stat Editor provides 80 rows for data input when there is an X column
    only, 40 rows when there are X and FREQ columns or X and Y columns, or
    26 rows when there are X, Y, and FREQ columns.
    Note: Use the FREQ (frequency) column to input the quantity (frequency) of
    identical data items. Display of the FREQ column can be turned on (displayed)
    or off (not displayed) using the Stat Format setting on the setup menu.
    1

    To select linear regression and input the following data:
    (170, 66), (173, 68), (179, 75)
    STAT

    (STAT)(A+BX)

    STAT

    170  173  179 AC

    STAT

    66  68  75 

    E-21



  • Page 23

    Important: • All data currently input in the Stat Editor is deleted whenever
    you exit the STAT Mode, switch between the single-variable and a pairedvariable statistical calculation type, or change the Stat Format setting on
    the setup menu. • The following operations are not supported by the Stat
    Editor: ;, ;(M–), B(STO). Pol, Rec, and multi-statements
    also cannot be input with the Stat Editor.
    To change the data in a cell: In the Stat Editor, move the cursor to the cell
    that contains the data you want to change, input the new data, and then
    press .
    To delete a line: In the Stat Editor, move the cursor to the line that you want
    to delete and then press ).
    To insert a line: In the Stat Editor, move the cursor to the location where
    you want to insert the line and then perform the following key operation:
    (STAT)(Edit)(Ins).
    To delete all Stat Editor contents: In the Stat Editor, perform the following
    key operation: (STAT)(Edit)(Del-A).

    Obtaining Statistical Values from Input Data
    To obtain statistical values, press  while in the Stat Editor and then
    recall the statistical variable (Sx, 3x2, etc.) you want. Supported statistical
    variables and the keys you should press to recall them are shown below.
    For single-variable statistical calculations, the variables marked with an
    asterisk (*) are available.
    Sum: 3x2*, 3x*, 3y2, 3y, 3xy, 3x3, 3x2y, 3x4
    (STAT) (Sum)  to 
    Number of Items: n*, Mean: M*, N, Population Standard Deviation: Sx*,
    Sy, Sample Standard Deviation: sx*, sy
    (STAT) (Var)  to 
    Minimum Value: minX*, minY, Maximum Value: maxX*, maxY
    (STAT) (MinMax)  to 
    (When the single-variable statistical calculation is selected)
    (STAT) (MinMax)  to 
    (When a paired-variable statistical calculation is selected)
    Regression Coefficients: A, B, Correlation Coefficient: r, Estimated
    Values: K, L
    (STAT) (Reg)  to 
    Regression Coefficients for Quadratic Regression: A, B, C, Estimated
    Values: K1, K2, L
    (STAT) (Reg)  to 
    • See the table at the beginning of this section of the manual for the regression
    formulas.
    • K, K1, K2 and L are not variables. They are commands of the type that take
    an argument immediately before them. See “Calculating Estimated Values”
    for more information.
    2 To input the single-variable data x = {1, 2, 2, 3, 3, 3, 4, 4, 5}, using
    the FREQ column to specify the number of repeats for each items
    ({xn; freqn} = {1;1, 2;2, 3;3, 4;2, 5;1}), and calculate the mean and
    population standard deviation.

    E-22



  • Page 24

    (SETUP)A(STAT)(ON)
    (STAT)(1-VAR)
    1  2  3  4  5 AC
    1232

    

    (STAT)(Var)(M)
    (STAT)(Var)(Sx)
    Results: Mean: 3
    3

    Population Standard Deviation: 1.154700538

    To calculate the linear regression and logarithmic regression
    correlation coefficients for the following paired-variable data and
    determine the regression formula for the strongest correlation: (x, y)
    = (20, 3150), (110, 7310), (200, 8800), (290, 9310). Specify Fix 3
    (three decimal places) for results.

    (SETUP)A(STAT)(OFF)
    (SETUP)(Fix)
    (STAT)(A+BX)
    20  110  200  290 AC
    3150  7310 8800  9310

    STAT

    FIX

    (STAT)(Reg)(r)
    (STAT)(Type)(In X)
    (STAT)(Reg)(r)
    (STAT)(Reg)(A)
    (STAT)(Reg)(B)
    Results: Linear Regression Correlation Coefficient: 0.923
    Logarithmic Regression Correlation Coefficient: 0.998
    Logarithmic Regression Formula: y = –3857.984 + 2357.532lnx

    Calculating Estimated Values
    Based on the regression formula obtained by paired-variable statistical
    calculation, the estimated value of y can be calculated for a given x-value.
    The corresponding x-value (two values, x1 and x2, in the case of quadratic
    regression) also can be calculated for a value of y in the regression
    formula.
    4

    To determine the estimate value for y when x = 160 in the
    regression formula produced by logarithmic regression of the data
    in 3 . Specify Fix 3 for the result. (Perform the following operation
    after completing the operations in 3 .)
     160 (STAT)(Reg)(L)

    Result: 8106.898
    Important: Regression coefficient, correlation coefficient, and estimated
    value calculations can take considerable time when there are a large number
    of data items.

    E-23



  • Page 25

    Creating a Number Table from a
    Function (TABLE)
    TABLE generates a number table for x and f(x) using an input f(x) function.
    Perform the following steps to generate a number table.
    1. Press (TABLE) to enter the TABLE Mode.
    2. Input a function in the format f(x), using the X variable.
    • Be sure to input the X variable (#(X)) when generating a number
    table. Any variable other than X is handled as a constant.
    • Pol and Rec cannot be input in the function.
    3. In response to the prompts that appear, input the values you want to use,
    pressing  after each one.
    For this prompt: Input this:
    Start?

    Input the lower limit of X (Default = 1).

    End?

    Input the upper limit of X (Default = 5).
    Note: Make sure that the End value is always
    greater than the Start value.

    Step?

    Input the increment step (Default = 1).
    Note: The Step specifies by how much the Start
    value should be sequentially incremented as the
    number table is generated. If you specify Start = 1
    and Step = 1, X sequentially will be assigned the
    values 1, 2, 3, 4, and so on to generate the number
    table until the End value is reached.

    • Inputting the Step value and pressing  generates and displays the
    number table in accordance with the parameters you specified.
    • Pressing  while the number table screen is displayed will return to
    the function input screen in step 2.
    1
    for the
    To generate a number table for the function f (x) = x2 +
    2
    range –1  x  1, incremented in steps of 0.5 
    (TABLE)

    

    

    #(X)V 1  2

    

     1  1  0.5 

    Note: • You can use the number table screen for viewing values only. Table
    contents cannot be edited. • The number table generation operation causes
    the contents of variable X to be changed.
    Important: The function you input for number table generation is deleted
    whenever you display the setup menu in the TABLE Mode and switch between
    Natural Display and Linear Display.

    E-24



  • Page 26

    Using VERIFY (VERIF)
    VERIFY is a function you can use to verify whether an input equality or
    inequality is true (indicated by TRUE) or false (indicated by FALSE). The
    following shows the general procedure for using VERIFY.
    To verify whether 4'
    9 = 12 is true 
    1. Press (VERIF) to enter the VERIFY Mode.
    Math

    2. Input 4'
    9 = 12.
    4 9 C  (VERIFY)  (=)12
    • You can select the equality symbol
    or inequality symbol from the menu
    that appears when you press
    (VERIFY).
    3. To verify, press .

    Math

    You can input the following expressions for verification in the VERIFY
    Mode.
    • Equalities or inequalities that include one relational operator 4 = 16,
    4 p 3, P  3, 1 + 2  5, (3 × 6) (2 + 6) × 2, etc.
    • Equalities or inequalities that include multiple relational operators 1  1 1 + 1,
    3 P 4, 22 = 2 + 2 = 4, 2 + 2 = 4 6, 2 + 3 = 5 p 2 + 5 = 8, etc.
    Note: • The verification result will cause 1 to be assigned to Ans memory
    when TRUE and 0 when FALSE. • The input expression can be a total of
    99 bytes, including the left side, right side, and relational operators. • Any
    variable (A, B, C, D, E, F, X, Y, M) input into an expression is treated as
    a value, using the value currently assigned to the variable. • Pol and Rec
    functions cannot be used in an expression.
    In the VERIFY Mode, the calculator performs a mathematical operation
    on the input expression and then displays TRUE or FALSE based on the
    result. Because of this, calculation error can occur or a mathematically
    correct result may not be able to be displayed when the input calculation
    expression includes calculation that approaches the singular point or
    inflection point of a function, or when the input expression contains multiple
    calculation operations.

    Expression Input Precautions
    The following types of expressions cause a Syntax ERROR and cannot
    be verified.
    • An expression with nothing on the left side or right side (Example: = 5'
    7)
    • An expression in which a relational operator is inside of a fraction or function
    (Example: 1 = 1 , cos (8 9))
    2
    • An expression in which a relational operator is enclosed in parentheses
    (Example: 8 (9 10))

    E-25



  • Page 27

    • An expression in which multiple relational operators that are not oriented
    in the same direction (Example: 5 6 >4)
    • An expression that contains two of the following operators in any combination
    (Example: 4 6 p 8)
    • An expression that contains consecutive relational operators
    (Example: 5 >9)

    VERIFY Mode Calculation Examples
    To verify log2 log3 log4
     (VERIF)
    : 2  (VERIFY)  ()
    : 3  (VERIFY)  ()
    : 4 
    3

    To verify 0

    2

    ( 98 ) – ( 89 )

    

     (VERIF)
    0  (VERIFY)  ()
    89C
    8  9 C7
    To verify 52 = 25 = 625

    
     (VERIF)
    5 7 (VERIFY)  (=)
    25  (VERIFY)  (=) 625 

    Calculation Ranges, Number of Digits,
    and Precision
    The calculation range, number of digits used for internal calculation, and
    calculation precision depend on the type of calculation you are performing.

    Calculation Range and Precision
    p1 s 10–99 to p9.999999999 s 1099 or 0

    Calculation Range
    Number of Digits for Internal
    Calculation
    Precision

    15 digits
    In general, p1 at the 10th digit for a single
    calculation. Precision for exponential
    display is p1 at the least significant digit.
    Errors are cumulative in the case of
    consecutive calculations.

    Function Calculation Input Ranges and Precision
    Functions
    sinx

    Input Range
    DEG

    0  \x\ 9 s109

    RAD

    0  \x\ 157079632.7

    GRA

    0  \x\ 1 s1010

    E-26



  • Page 28

    cosx

    tanx
    sin–1x
    cos–1x

    DEG

    0  \x\ 9 s109

    RAD

    0  \x\ 157079632.7

    GRA

    0  \x\ 1 s1010

    DEG

    Same as sinx, except when \x\ = (2n–1) s90.

    RAD

    Same as sinx, except when \x\ = (2n–1) sP/2.

    GRA

    Same as sinx, except when \x\ = (2n–1) s100.

    0  \x\ 1

    tan–1x

    0  \x\ 9.999999999 s1099

    sinhx
    coshx

    0  \x\ 230.2585092

    sinh–1x

    0  \x\ 4.999999999 s1099

    cosh–1x

    1  x 4.999999999 s1099

    tanhx

    0  \x\ 9.999999999 s1099

    tanh–1x

    0  \x\ 9.999999999 s10–1

    logx/lnx

    0 x 9.999999999 s1099

    10x

    –9.999999999 s1099  x  99.99999999

    ex
    x
    '
    x2
    x –1
    3
    
    x
    x!

    –9.999999999 s1099  x  230.2585092
    0  x 1 s10100
    \x\ 1 s1050
    \x\ 1 s10100 ; x & 0
    \x\ 1 s10100
    0  x  69 (x is an integer)

    nPr

    0  n 1 s1010, 0  r  n (n, r are integers)
    1  {n!/(n–r)!} 1 s10100

    nCr

    0  n 1 s1010, 0  r  n (n, r are integers)
    1  n!/r! 1 s10100 or 1  n!/(n–r)! 1 s10100

    Pol(x, y)
    Rec(r, Ƨ)

    °’ ”

    \x\, \y\ 9.999999999 s1099

    x2 + y2 9.999999999 s1099
    0  r 9.999999999 s1099
    Ƨ: Same as sinx
    \a\, b, c 1 s10100; 0  b, c
    The display seconds value is subject to an error of 21 at
    the second decimal place.
    \x\1 s10100
    Decimal j Sexagesimal Conversions
    0°00˝  \x\ 9999999°5959˝

    xy

    x0: –1 s10100 ylogx 100
    x= 0: y 0 m
    x 0: y = n, 2 +1 (m, n are integers)
    n
    However: –1 s10100 ylog \x\100
    E-27



  • Page 29

    x

    y
    '

    y0: x & 0, –1 s10100 1/x logy 100
    y= 0: x 0
    y 0: x = 2n+1, 2n+1 (m & 0; m, n are integers)
    m
    However: –1 s10100 1/x log \y\100

    Total of integer, numerator, and denominator must be 10
    digits or less (including division marks).
    RanInt#(a, b) a b; \a\, \b\1 s1010; b – a 1 s1010

    a b/c

    • Precision is basically the same as that described under “Calculation Range
    and Precision”, above.
    x
    y , 3, x!, nPr, nCr type functions require consecutive internal
    • x y, '
    calculation, which can cause accumulation of errors that occur with each
    calculation.
    • Error is cumulative and tends to be large in the vicinity of a function’s singular
    point and inflection point.
    • The range for calculation results that can be displayed in P form when using
    Natural Display is \x\ 106. Note, however, that internal calculation error
    can make it impossible to display some calculation results in P form. It also
    can cause calculation results that should be in decimal form to appear in
    P form.

    Errors
    The calculator will display an error message whenever an error occurs for
    any reason during a calculation. There are two ways to exit an error message
    display: Pressing B or C to display the location of the error, or pressing
     to clear the message and calculation.

    Displaying the Location of an Error
    While an error message is displayed, press B or C to return to the
    calculation screen. The cursor will be positioned at the location where
    the error occurred, ready for input. Make the necessary corrections to the
    calculation and execute it again.
    When you input 14 ÷ 0 s 2 = by mistake instead of 14 ÷ 10 s 2 =
    
    
    14  0 2 

    Math

    C (or B)
    

    B1

    Clearing the Error Message
    While an error message is displayed, press  to return to the calculation
    screen. Note that this also clears the calculation that contained the error.

    E-28



  • Page 30

    Error Messages
    Math ERROR
    Cause: • The intermediate or final result of the calculation you are performing
    exceeds the allowable calculation range. • Your input exceeds the allowable
    input range (particularly when using functions). • The calculation you are
    performing contains an illegal mathematical operation (such as division
    by zero).
    Action: • Check the input values, reduce the number of digits, and try again.
    • When using independent memory or a variable as the argument of a function,
    make sure that the memory or variable value is within the allowable range
    for the function.
    Stack ERROR
    Cause: The calculation you are performing has caused the capacity of the
    numeric stack or the command stack to be exceeded.
    Action: • Simplify the calculation expression so it does not exceed the
    capacity of the stack. • Try splitting the calculation into two or more parts.
    Syntax ERROR
    Cause: There is a problem with the format of the calculation you are
    performing.
    Action: Make necessary corrections.
    Insufficient MEM Error
    Cause: The configuration of TABLE Mode parameters caused more than 30
    X-values to be generated for a table.
    Action: Narrow the table calculation range by changing the Start, End, and
    Step values, and try again.
    Argument ERROR
    Cause: A non-integer argument was input for the random number function
    (RanInt#).
    Action: Input only integers for the argument.

    Before Assuming Malfunction of the
    Calculator...
    Perform the following steps whenever an error occurs during a calculation
    or when calculation results are not what you expected. If one step does not
    correct the problem, move on to the next step.
    Note that you should make separate copies of important data before
    performing these steps.
    1. Check the calculation expression to make sure that it does not contain any
    errors.
    2. Make sure that you are using the correct mode for the type of calculation
    you are trying to perform.
    3. If the above steps do not correct your problem, press the  key. This will
    cause the calculator to perform a routine that checks whether calculation
    functions are operating correctly. If the calculator discovers any abnormality,
    it automatically initializes the calculation mode and clears memory contents.
    For details about initialized settings, see “Configuring the Calculator
    Setup”.
    4. Initialize all modes and settings by performing the following operation:
    (CLR)(Setup)(Yes).

    E-29



  • Page 31

    Replacing the Battery
    A low battery is indicated by a dim display, even if contrast is adjusted, or by
    failure of figures to appear on the display immediately after you turn on the
    calculator. If this happens, replace the battery with a new one.
    Important: Removing the battery will cause all of the calculator’s memory
    contents to be deleted.
    1. Press (OFF) to turn off the calculator.
    2. Remove the cover as shown in the illustration and replace the battery,
    taking care that its plus (+) and minus (–) ends are facing correctly.
    3. Replace the cover.
    4. Initialize the calculator: (CLR)(All)(Yes)
    • Do not skip the above step!
    Screw
    Screw

    Screw

    fx-85GT PLUS

    fx-83GT PLUS

    Specifications
    Power Requirements:
    fx-83GT PLUS: AAA-size battery R03 (UM-4) s 1
    fx-85GT PLUS: Built-in solar cell; button battery LR44 (GPA76) s 1
    Approximate Battery Life:
    fx-83GT PLUS: 17,000 hours (continuous display of flashing cursor)
    fx-85GT PLUS: 3 years (based on one hour of operation per day)
    Power Consumption: 0.0002 W (fx-83GT PLUS)
    Operating Temperature: 0°C to 40°C (32°F to 104°F)
    Dimensions:
    fx-83GT PLUS: 13.8 (H) s80 (W) s162 (D) mm
    1
    /2 (H) s31/8 (W) s63/8 (D)
    fx-85GT PLUS: 11.1 (H) s80 (W) s162 (D) mm
    3
    /8 (H) s31/8 (W) s63/8 (D)
    Approximate Weight:
    fx-83GT PLUS: 100 g (3.5 oz) including the battery
    fx-85GT PLUS: 95 g (3.4 oz) including the battery

    Frequently Asked Questions
    I How can I perform input and display results the same way I did on a
    model that does not have Natural Textbook Display?
    Perform the following key operation: (SETUP)(LineIO). See
    “Configuring the Calculator Setup” on page E-5 for more information.
    I How can I change a fraction form result to decimal form?
    How can I change a fraction form result produced by a division
    operation to decimal form?
    See “Toggling Calculation Results” on page E-13 for the procedure.

    E-30



  • Page 32

    I What is the difference between Ans memory, independent memory,
    and variable memory?
    Each of these types of memory acts like “containers” for temporary storage
    of a single value.
    Ans Memory: Stores the result of the last calculation performed. Use this
    memory to carry the result of one calculation on to the next.
    Independent Memory: Use this memory to totalize the results of multiple
    calculations.
    Variables: This memory is helpful when you need to uses the same value
    multiple times in one or more calculations.
    I What is the key operation to take me from the STAT Mode or TABLE
    Mode to a mode where I can perform arithmetic calculations?
    Press (COMP).
    I How can I return the calculator to its initial default settings?
    Perform the following operation: (CLR)(Setup)(Yes)
    I When I execute a function calculation, why do I get a calculation result
    that is completely different from older CASIO calculator models?
    With a Natural Textbook Display model, the argument of a function that
    uses parentheses must be followed by a closing parenthesis. Failing to
    press  after the argument to close the parentheses may cause unwanted
    values or expressions to be included as part of the argument.
    Example: (sin 30) + 15 B
    Older (S-VPAM) Model:
    Q 30 15 
    Natural Textbook Display Model: 1 Q 30  15 

    15.5
    15.5

    Failure to press  here as shown below will result in calculation of sin 45.

    Q 30 15  0.7071067812

    Manufacturer:
    CASIO COMPUTER CO., LTD.
    6-2, Hon-machi 1-chome
    Shibuya-ku, Tokyo 151-8543, Japan

    Responsible within the European Union:
    CASIO EUROPE GmbH
    Casio-Platz 1
    22848 Norderstedt, Germany
    This mark applies in EU countries only.

    SA0909-A






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