Section 1: Getting Started 23
Example: Calculate (9 + 17 − 4) ÷ 4.
Keystrokes Display
9 v
9.0000
Digit entry terminated.
17 +
26.0000
(9 + 17).
4 -
22.0000
(9 + 17 − 4).
4 ÷
5.5000
(9 + 17 − 4) ÷ 4.
Even more complicated problems are solved in the same manner—using
automatic storage and retrieval of intermediate results. It is easiest to
work from the inside of parentheses outwards, just as you would with
calculations on paper.
Example: Calculate (6 + 7) × (9 − 3).
Keystrokes Display
6 v
6.0000
First solve for the intermediate
result of (6 + 7).
7 +
13.0000
9 v
9.0000
Then solve for the intermediate
result of (9 − 3).
3 -
6.0000
*
78.0000
Then multiply the intermediate
results together (13 and 6) for
the final answer.
Try your hand at the following problems. Each time you press v or
a function key in a calculation, the preceding number is saved for the next
operation.
(16 × 38) − (13 × 11) = 465.0000
4 × (17 − 12) ÷ (10 − 5) = 4.0000
23
2
− (13 × 9) + 1/7 = 412.1429
√
[(5.4 × 0.8) ÷ (12.5 − 0.7
2
)] = 0.5998
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