Casio fx-991ES PLUS User Manual

Table of Contents
Before Using the Calculator.................................................... 4
About this Manual.................................................................................... 4
Initializing the Calculator..........................................................................4
Precautions..............................................................................................4
Safety Precautions..........................................................................................4
Handling Precautions......................................................................................5
Getting Started.........................................................................................5
Removing the Hard Case................................................................................5
Turning Power On and Off.............................................................................. 6
Adjusting Display Contrast..............................................................................6
Key Markings.................................................................................................. 6
Reading the Display........................................................................................7
Using Menus................................................................................................... 9
Calculation Modes and Calculator Setup.............................10
Calculation Mode................................................................................... 10
Configuring the Calculator Setup...........................................................10
Initializing Calculator Settings....................................................................... 14
Inputting Expressions and Values........................................16
Basic Input Rules...................................................................................16
Inputting with Natural Display................................................................ 17
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Form Calculation Range.................................................................... 17
Using Values and Expressions as Arguments (Natural Display only)....18
Overwrite Input Mode (Linear Display only)...........................................19
Correcting and Clearing an Expression................................................. 19
Basic Calculations..................................................................20
Toggling Calculation Results..................................................................20
Fraction Calculations............................................................................. 21
Percent Calculations..............................................................................22
Degree, Minute, Second (Sexagesimal) Calculations............................22
Multi-Statements....................................................................................23
Using Engineering Notation................................................................... 23
Calculation History and Replay..............................................................24
Calculation History........................................................................................ 24
Replay...........................................................................................................24
Using Memory Functions....................................................................... 25
Answer Memory (Ans)...................................................................................25
Variables (A, B, C, D, E, F, M, X, Y)..............................................................25
Independent Memory (M)..............................................................................26
Clearing the Contents of All Memories..........................................................26
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Casio fx-991ES PLUS Specifications

General

Type	Scientific
Cover	No
Form factor	Desktop
Control type	Buttons
Product color	Gray
Digits	15 digits
Display type	Dot-matrix
Display resolution	96 x 31 pixels
Display number of lines	10 lines
Storage media type	Not available
Battery life	3 year(s)
Battery type	LR44
Power source	Battery/Solar
Number of batteries supported	1
Symbolic notation	Square root
Conversion between	Decimal, Fraction, Percent
Convert angles from degrees to	Gradian, Radian
Random number/integer generator	Yes

Weight and Dimensions

Depth	162 mm
Width	80 mm
Height	11.1 mm
Weight	95 g