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Casio fx-991ES PLUS User Manual

Casio fx-991ES PLUS
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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.
Example 1: 4 × sin30 × (30 + 10 × 3) = 120
*1 Input of the closing parenthesis is required for sin, sinh, and other
functions that include parentheses.
*2 These multiplication symbols (×) 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), scientific
constants, π or e.
*3 The closing parenthesis immediately before the
operation can be
omitted.
Example 2: Input example omitting
*2
and
*3
operations in the
above example.
4 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 and to move the cursor.
When Linear Display is selected, pressing will cause the cursor to jump to the
beginning of the calculation, while will jump to the end.
16

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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