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Calculation priority sequence – Casio FX-55 User Manual

Page 7

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E-6

4

Ч (30 + 10 Ч 3) = 240

4

*( 30 + 10 * 3 )=

*

1

*

2

*

1

A multiplication symbol (

×) can be omitted when it occurs immediately

before an opening parenthesis, immediately before Rnd or RanInt# function
that includes parentheses, immediately before the Ran# (random number)
function, or immediately before independent memory (M) or

π.

*

2

The closing parenthesis immediately before the

= operation can be

omitted.

Input example omitting

**

1

and

)*

2

operations in the above

example.

4

( 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

d and e to move the cursor. • Pressing e while the cursor

is at the end of the input calculation will cause it to jump to the beginning,
while pressing

d 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

k 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.

1st

Parenthetical expressions

2nd

Function with parentheses: Rnd(, RanInt#(

3rd

Functions that come after the input value (

x

2

,

x

–1

, °’ ”, %), powers

(

x

^), square root ())

4th

Fractions

5th

Negative sign (–)
Note: When squaring a negative value (such as –2), the value
being squared must be enclosed in parentheses (

(- 2 )w

=). Since

x

2

has a higher priority than the negative sign,

inputting

- 2 w= would result in the squaring of 2 and then

appending a negative sign to the result. Always keep the priority
sequence in mind, and enclose negative values in parentheses
when required.

6th

Multiplication where the multiplication sign is omitted

7th

Multiplication (

×), division (÷), remainder calculations (÷R)

8th

Addition, subtraction (+, –)

Math

Math

Math

Math