Table of Contents
Advertisement
To multiply 12 by 3,
Enter:
12
SAV
E
.
3 x
To
divide
12
by 3,
See Displayed:
- - - -
...
-
Enter:
See Displayed:
12
SAV
E
+
3
.;. !-
--
-----1 ....
_
In
addition
to the
simple
problems you have just performed, the HP-80
also
hand
les
combined arithmetic processes:
-
Automat ic Do ubling
-
Seria
l
Calcu lation
-
Automatic Squaring
-
Chained Ca lc
ul
ation
These
problems are described in Appendix B.
Manipulating Data
Seven keys (excluding keys used to load entries in special operations)
are
used to
control
the location of data and the movement
of
data
between locations.
Four of
these keys
are
related to
entering
and de-
leting
numbers:
SAV
E
+
is
used
to
load
data;
STO
stores a constant
CLEAR
value;
CHS
changes the
sign of
a displayed number;
CLX
clears data.
The
remaining three keys (
R+ ,
x:y
,
RC~
)
are
used to control the lo-
cation of
data after it has been loaded
(or stored,in
the
case
of
STO
).
Through
the ability to manipulate the location of data
,
you are
able
to
view the contents, can see intermediate results to problems, and have
greater operating
flexibility.
Reviewing/Verifying Data Entered
The
R+
(roll down) key permits you to review the previous entries or
results-the last three preceding numbers to
be
loaded and the current
entry.
Each
time
R+
is
pressed,
one
of those numbers appears on the
display
in
last-in/first-out order.
No
data are lost by rotating those
numbers; after
a complete
circuit,
they will
return
to the same locations
they occupied before rotation.
For example,
Enter:
1
See Displayed:
- - - -
....
-
-----------~
..
~
-
- - - - - - - - - -
--
. . . . . .
...
-----------~
. .
~
...
-----------~
..
~
...
16
Advertisement
Table of Contents
