HP HP-25 - Page 24

Now try these problems. Notice that for each problem you only
have to press BEQ to insert a pair of numbers into the calcu-
lator—each subsequent operation is performed using a new
number and an automatically stored intermediate result.
To solve Press Display
2+ 3)
10 [ENTER+
N
s
3(16 —4)
— N
36.00
4+7+3-2
4 ENTER4
5.50
Problems that are even more complicated can be solved in the
same simple manner, using the automatic storage of intermedi-
ate results. For example, to solve (2 + 3) x (4 + 5) with a pencil
and paper, you would: