HP HP-15C - Page 23

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
5998.0)]7.05.12()8.04.5[(
2
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