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Getting Started
19
system
makes
the process of working
through
a
problem
as
natural
as
it
would
be if
you were working
it
out with
pencil
and
paper, but the
calculator
takes
care of
the hard part.
For example, solve (12
+
3)
x
7.
If
you were working
the problem
with a
pencil
and
paper,
you
would first calculate
the
intermedia
te result
of (12
+
3).
(11
I
3t
x
7
=
IS-
. and
then
you would
mUltiply the intermediate result
by
7.
~
x
7=
105
15
X
7
You work through
the problem
exactly
the
same way
with the
HP-25
,
one operation at a
time.
You
solve
for the
intermediate
result
first
...
(12
+
3)
Press
Display
12
1
12 .
]
mmm
1
12 . 0 0
1
3
1
3 .
1
[±J
1
1 5.00
I
Intermediate
result
.
.
and
then solve
for
the
final
a nswe
r.
You don
'
t
need
to
press
mmm
to
sto
re the
intermediate result-the
HP-25
a
uto-
ma
tically
stores
it in
s
ide the
calculator when you key
in
the
next
number.
To continue.
Press
Display
7
1
7.
1
1 05.00
The intermediate
re
s
ult
from the
pre-
ceding operation
is a utomatica
ll
y
stored
in
s
ide
the
ca
lc
ul
a
tor
when you
key in this number.
Pres sing the function
key
multiplie
s
the
new
number
a
nd
the
intermediate
re
s ult, givi
ng
you the final answer.
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