HP 15c User Manual
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
ч
5.5000
(9 + 17 – 4) ч 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 Ч 38) – (13 Ч 11) = 465.0000
4 Ч (17 – 12) ч (10 – 5) = 4.0000
23
2
– (13 Ч 9) + 1/7 = 412.1429
5998
.
0
)]
7
.
0
5
.
12
(
)
8
.
0
4
.
5
[(
2