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Casio fx-991ES PLUS User Manual

Casio fx-991ES PLUS
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Frequently Asked Questions
Frequently Asked Questions
■ How can I perform input and display results the same way I did on
a model that does not have Natural Textbook Format?
→ Perform the following key operation:
(SETUP) (LineIO). See
"Configuring the Calculator Setup" for more information.
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" for the procedure.
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.
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).
How can I return the calculator to its initial default settings?
Perform the following key operation:
(CLR) (Setup) (Yes).
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.
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Table of Contents

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Casio fx-991ES PLUS Specifications

General IconGeneral
TypeScientific
CoverNo
Form factorDesktop
Control typeButtons
Product colorGray
Digits15 digits
Display typeDot-matrix
Display resolution96 x 31 pixels
Display number of lines10 lines
Storage media typeNot available
Battery life3 year(s)
Battery typeLR44
Power sourceBattery/Solar
Number of batteries supported1
Symbolic notationSquare root
Conversion betweenDecimal, Fraction, Percent
Convert angles from degrees toGradian, Radian
Random number/integer generatorYes
Weight and Dimensions IconWeight and Dimensions
Depth162 mm
Width80 mm
Height11.1 mm
Weight95 g

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