In the second case, the /key acts like the =key by displaying the result of 750 x 12.

Here’s a longer chain calculation.

456 - 75 ⋅ 68

18.5 1.9

This calculation can be written as: 456 − 75 ⎟ 18.5 x 68 ⎟ 1.9. Watch what happens in the display as you key it in:

Keys:

Display:

456 -75 /

%*#&((D"

18.5 *

$(&.,B"

68 /

#K+((&+%D"

1.9= -%-&(-"

vUsing Parentheses in Calculations

Use parentheses when you want to postpone calculating an intermediate result until you’ve entered more numbers. For example, suppose you want to calculate:

30x 9

85 -12

If you were to key in 30 /85 -, the calculator would calculate the intermediate result, 0.35. However, that’s not what you want. To delay the division until you’ve subtracted 12 from 85, use parentheses:

Keys:

Display:

Description:

30 /(85-

%(&((DL*.&((/"

No calculation is done.

12 )

%(&((D-%&(("

Calculates 85 − 12.

*9

(&+#B,"

Calculates 30 / 73.

=

%&-("

Calculates 0.41x 9.

2: Arithmetic 39

File name : 17BII-Plus-Manual-E-PRINT-030709

Print data : 2003/7/11