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Casio fx-991ES PLUS User Manual

Casio fx-991ES PLUS
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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 " " 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 and 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 .
19

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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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