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HP HP-25 User Manual

HP HP-25
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Storage
Register
Arithmetic
Arithmetic
is
performed
upon
the
contents
of
the
storage
regis-
ster
by
pressing
[
followed
by
the
arithmetic
function
key
followed
in
turn
by
the
register
address.
For
example:
Press
Result
1
Number
in
displayed
X-register
added
to
con-
tents
of
storage
register
R,,
and
sum
placed
into
R,:
(r;
+
x—
R)).
=12
Number
in
displayed
X-register
subtracted
from
contents
of
storage
register
R,,
and
difference
placed
into
R,:
(r,
—
x
=
R,).
B
(x]3
Number
in
displayed
X-register
multiplied
by
contents
of
storage
register
R,,
and
the
product
placed
into
Ry:
[
(r;)
X
—
Rg].
B
(=4
Contents
of
storage
register
R,
divided
by
number
in
displayed
X-register,
and
quotient
placed
into
Ry
(ry
+
x—Ry).
When
storage
register
arithmetic
operations
are
performed,
the
answer
is
written
into
the
selected
storage
register,
while
the
contents
of
the
displayed
X-register
and
the
rest
of
the
stack
remain
unchanged.
Example:
During
harvest,
a
farmer
trucks
tomatoes
to
the
cannery
for
three
days.
On
Monday
and
Tuesday
he
hauls loads
of
25
tons,
27
tons,
19
tons,
and
23
tons,
for
which
the
cannery
pays
him
$55
per
ton.
On
Wednesday
the
price
rises
to
$57.50
per
ton,
and
he
ships
loads
of
26
tons
and
28
tons.
If
the
cannery
deducts
2%
of
the
price
on
Monday
and
Tuesday
because
of
blight
on
the
tomatoes,
and
3%
of
the
price
on
Wednesday,
what
is
the
farmer’s
total
net
income?
Method:
Keep
total
amount
in
a
storage
register
while
using
the
stack
to
add
tonnages
and
calculate
amounts
of
loss.
Press
Display
25
27
19[+]23[#]
Total
of
Monday’s
and
Tuesday’s
tonnage.
55[x]
Gross
amount
for
Monday
and
Tuesday.

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HP HP-25 Specifications

General IconGeneral
BrandHP
ModelHP-25
CategoryCalculator
LanguageEnglish

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