Casio FX-991ES Support Question
Casio FX-991ES Support Question
Find answers below for this question about Casio FX-991ES.Need a Casio FX-991ES manual? We have 2 online manuals for this item!
Question posted by bcube1010 on January 15th, 2013
Verification Of The Authenticity Of A 991es Plus Calculator.
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Related Casio FX-991ES Manual Pages
User Guide - Page 4
... event shall CASIO Computer Co., Ltd. k Using the Separate Appendix
Whenever you see "Using Calculator Memory". Moreover, CASIO Computer Co., Ltd.
Note that come with the marks in the Appendix....
• The following procedure when you want to initialize the calculator and return the calculation mode and setup to anyone for
special, collateral, incidental, or consequential...
User Guide - Page 5
... create the risk of fire and personal injury.
• Always make sure that can result in a safe place where it will not get into the
calculator. • Use only the type of battery specified for later reference. E-3 If accidentally swallowed, consult with a physician immediately.
• Never charge the battery, try to...
User Guide - Page 6
... direct sunlight, near a window, near a heater or anywhere else it might be splashed by water or exposed to large amounts of the calculator. Also avoid leaving the calculator in the calculator.
• The battery that comes with a ballpoint pen or
other pointed object. • Use a soft, dry cloth to clean the exterior of...
User Guide - Page 7
...mode menu (which appears when you want, press A.
• You can also adjust contrast using the calculator, slide its hard case downwards to remove it probably means that battery power is low. Use d ... display.
E-5
k Turning Power On and Off
• Press O to turn off the calculator. Important!
• If adjusting display contrast does not improve display readability, it , and then affix ...
User Guide - Page 8
...keypad will unshift and this indicator will disappear when you press 1t(STO). The calculator is in the CMPLX Mode.
The default angle unit is selected as the input.../output format. E-6 A fixed number of a variable name to the variable. Example:
Input expression
{ Calculation result
k Display Indicators
Sample Display:
CMPLX
This indicator:
S
A
M
STO
RCL
STAT CMPLX
MAT VCT...
User Guide - Page 9
... type of operation: General calculations Complex number calculations Statistical and regression calculations Calculations involving specific number systems (binary, octal, decimal, hexadecimal) Equation solution Matrix calculations Generation of calculation that corresponds to the mode you can jump between using c and f. Calculation Modes and Calculator Setup
k Calculation Modes
When you can...
User Guide - Page 10
... Display Examples • Fix: The value you specify (from 0 to the specified digit before being displayed. Calculation results are rounded off to 9) controls the number of
decimal places for displayed calculation results. Calculation results are written on paper.
• Linear format causes fractions and other expressions to the specified digit before being displayed...
User Guide - Page 11
The decimal point for calculation results
. • Norm: Selecting one of the STAT Mode STAT editor screen on or off.
only. Outside the specified range, results are displayed using exponential ...
User Guide - Page 12
... the = key to execute it is automatically input with Parenthesis
When you input any of the functions shown below .
19(CLR)1(Setup)=(Yes)
This setting: Calculation Mode Input/Output Format Angle Unit Display Digits Fraction Display Format Complex Number Format Statistical Display Decimal Point
Is initialized to input the argument and...
User Guide - Page 13
..., each key operation uses up more information, see "Omitting a Final Closed Parenthesis". For more closed parentheses that requires two key operations to the right of a calculation, immediately before the = key is pressed. Final Closed Parenthesis You can use Math format. At this time, you are inputting functions with Math Format".
Note...
User Guide - Page 14
...use the insert mode. With the overwrite mode, any new character you input replaces the character at a convenient point and
calculate the result.
Changing the Character or Function You Just Input
Example: To correct the expression 369 × 13 so it ... the Math format is selected. • The initial default for more information. • The calculator automatically changes to Math.
User Guide - Page 15
... × 12 LINE Insert Mode:
369**12
dd
Y Overwrite Mode:
369**12
ddd
Y
Correcting a Calculation Example: To correct cos(60) so it becomes sin(60) LINE Insert Mode:
c60)
dddY
s Overwrite Mode:
c60)
...dddd
s Inserting Input into a Calculation Always use the insert mode for this operation. E-13 Use d or e to move the cursor to the...
User Guide - Page 16
... are inputting exceeds the allowable limit.
• Nesting of functions and parentheses is causing the error. LINE
14/0*2=
Press e or d.
The maximum allowable height of a calculation formula to be greater than one display line.
d1
=
You can also exit the error screen by mistake instead of the...
User Guide - Page 17
... Fraction Mixed Fraction log(a,b) (Logarithm) 10^x (Power of 10) e^x (Power of e) Square Root Cube Root Square, Cube Reciprocal Power Power Root Integral Derivative Σ Calculation Absolute Value Parentheses
Key Operation ' 1'(() & 1l($) 1i(%) ! 1!(#) w, 1w(x3) E 6 16(") 7 17(F) 1&(8) 1w(Abs) ( or )
Bytes 9 13 6 4 4 4 9 4 5 4 9 8 6 8 4 1
Math Format Input Examples • The following...
User Guide - Page 18
... need to view the entire input expression again, press A and then press e. Example 3: To input (1 + 2 )2 × 2 =
5
MATH
Math
(1+'2c5e)
w*2=
• When you press = and obtain a calculation result using Math format, you can be used in the above procedure, and the required key operations to use them.
User Guide - Page 19
...S-D Transformation". Example 1: '2 +'8 = 3'2
MATH
Math
1
!2e+!8=
Math
2
!2e+!81=
E-17 Original Expression:
Function Key Operation
Integral
7
Resulting Expression
Derivative
17(F)
Σ Calculation 1&(8)
You can specify whether calculation results should be displayed in a form that includes expressions like '2 and π (irrational number form). • Pressing = after inputting...
User Guide - Page 20
... root symbols can be displayed in the CMPLX Mode, the following are the input value ranges for which ' form is also counted as a term). ' form calculation results use display formats like those shown
below.
± a'b , ± d ± a'b , ± a'b ± d'e cf
E-18 Results that includes ' within irrational number display) results can have...
User Guide - Page 21
... results are reduced to a common denominator, they are reduced to be used. More than two terms in the calculation result
• Calculation results displayed in decimal form even when any intermediate result has three or more terms.
Example: (1 + '2 + '3 )(1 - '2 - '3 )(= -4 - 2'6 ) = -8.898979486
E-19
Value outside the corresponding ranges of coefficients (a, c, ...
User Guide - Page 22
Number of Decimal Places and Number of Significant Digits You can specify a fixed number of Display Digits". E-20
For more information, see "Calculation Priority Sequence". Example: 1 ÷ 6 =
LINE
Initial default setting (Norm1)
FIX
3 decimal places (Fix3)
SCI
3 significant digits (Sci3) • For more information, see "Specifying the Number ...
User Guide - Page 23
...Closed Parenthesis You can omit any closed parenthesis ( ) ) immediately preceding operation of the = key at the end of a calculation that is currently selected.
E-21 Appendix -2 + -1 = -7
326 3 -1 + 1 -2 = 4 - 11 (... (2 + 3) × (4 - 1) = 15
LINE
(2+3)* (4-1=
k Fraction Calculations
How you should input fractions depends on the input/output format that involves both fraction and...
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