Casio fx-991ES PLUS User Manual

Fix: The value you specify (from 0 to 9) controls the number of decimal
places for displayed calculation results. Calculation results are rounded off
to the specified digit before being displayed.
Example: (LineIO) 100 ÷ 7 = 14.286 (Fix 3)
14.29 (Fix 2)
Sci: The value you specify (from 0 to 9) controls the number of significant
digits for displayed calculation results. Calculation results are rounded off
to the specified digit before being displayed.
Example: (LineIO) 1 ÷ 7 = 1.4286 × 10
-1
(Sci 5)
1.429 × 10
-1
(Sci 4)
1.428571429 × 10
-1
(Sci 0)
Norm: Selecting one of the two available settings (Norm 1, Norm 2)
determines the range in which results will be displayed in exponential
format. Outside the specified range, results are displayed using non-
exponential format.
Norm 1: 10
-2
> |x|, |x| ≧ 10
10
Norm 2: 10
-9
> |x|, |x| ≧ 10
10
Example: (LineIO) 1 ÷ 200 = 5 × 10
-3
(Norm 1)
0.005 (Norm 2)
Specifying the Fraction Display Format
To specify this
fraction display
format:
Perform this key operation:
Mixed (SETUP) (ab/c)
Improper (SETUP) (d/c)
Specifying the Complex Number Format
To specify this
complex number
format:
Perform this key operation:
Rectangular
Coordinates
(SETUP) (CMPLX) (a+bi)
Polar Coordinates
(SETUP) (CMPLX) (r∠θ)
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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