Casio fx-991ES PLUS User Manual download pdf (Page 8)

E-7

Initializing Calculator Settings

Perform the following procedure to initialize the calculator, which returns the

calculation mode to COMP and returns all other settings, including setup

menu settings, to their initial defaults.

(CLR)(Setup)(Yes)

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.

4 ssin30 s(30 + 10 s3) = 120

Q 30  30  10  3 

Input of the closing parenthesis is required for sin, sinh, and other functions

that include parentheses.

These multiplication symbols (s) 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,

P or

The closing parenthesis immediately before the  operation can be

omitted.

Input example omitting *

and *

operations in the above

example.

Q 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

B and C to move the cursor. • When Linear Display is selected,

pressing

D will cause the cursor to jump to the beginning of the calculation,

while

A will jump to the end. • When Natural Display is selected, pressing

C while the cursor is at the end of the input calculation will cause it to jump

to the beginning, while pressing

B while the cursor is at the beginning will

cause it to jump to the end. • You can input up to 99 bytes for a calculation.

Each numeral, symbol, or function normally uses one byte. Some functions

require three to 13 bytes. • The cursor will change shape to

I when there are

10 bytes or less of allowed input remaining. If this happens, end calculation

input and then press

.

Calculation Priority Sequence

The priority sequence of input calculations is evaluated in accordance with the

rules below. When the priority of two expressions is the same, the calculation

is performed from left to right.



1 2 3 4 5 6 7 8 9 10 11 12 13 ... 45 46

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Casio fx-991ES PLUS User Manual Page 8

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