HP 25 Owner's Handbook Manual page 25

Getting Started
21
(2
+
3)
x
(4
+
5)
First solve for the
contents of these
parentheses .. ..
. . .. and then for
these parentheses
. and then you would multiply the
two intermediate answers together.
You work through the problem the same way with the HP-25.
First you solve for the intermediate result of (2
+
3) .
~x
(4+ 5)
~
Then add 4 and 5:
Press
2
miim
3
[±]
Display
12.
12.00
15.00
Intermediate
result.
(Since you must now key in another pair of numbers before you
can perform a function, you use the
miim
key again to.sepa-
rate the first number of the pair from the second.)
Procedure
Press
Display
~~
4
miim
5
[±]
1'-- 9_ .0-'- 0 _---'
S-
j
Then multiply the intermediate answers together for the final
answer:
Procedure
Press
Display
~X...(4
1 5)-
0
145.00
!J
x
'1
Notice that you didn ' t need to write down o r key in the inter-
mediate answers from in side the parenthese s before you multi-
plied-the HP-25 automatically stacked up the intermedi ate