HP 25 User Manual

46 The Automatic Memory Stack
For example, you co uld work the problem above by beginning
at the left side
of the equation and simply working through it in
left-to-right order. All problems cannot be solved using left-to-
right
order, however, and the best order for solving any prob-
lem
is to begin with the innermost parentheses and work out-
ward. So, to
solve the problem above:
Press Display
3
3.
~ ~ ==:
mmm 3.00
4 i===;: 4. ===:
El 0.75 Intermediate answer for (3 74).
5 5.
~==== ==:
mmm ~ 5 . = 00 =====i
2 2.
El 2.50
B -1.75
4 4.
~======:
mmm 4.00
3 3.
~ 1 ~ 2 :=; . 0 :=:;: 0 = =:
10.25
3 I 3.
~ :=:==, = =:
mmm I 3.00
.2 13 I 0.213
o I 0.64
El I 16.04
5 I 5.
o ~I =8 '== 0= .2 == 0 ==i
Intermediate answer for (572).
Intermediate answer for
(3 7 4) - (5 7 2).
Intermediate answer for (4 x 3)
Intermediate answer for
(3 7 4) - (5 7 2) + (4 x 3).
Intermediate answer for (3 x .213).
The first number is keyed in.
The final answer.
Constant Arithmetic
You may have noticed that whenever the stack drops becaus e
of a two-number operation (not because of mJ ), the number
in the T-register is reproduced there . This stack operation can
be used to insert a oonstant into a problem.

HP 25 Specifications

General

Brand	HP
Model	25
Category	Calculator
Language	English