Radio Shack 65-789 Owner's Manual - page 6
5
Operation
SELECTING A FLOATING
OR FIXED DECIMAL POINT
The decimal switch (
A/0/2/3/4/F
) determines
how many digits the calculator places after
the decimal point.
When you select
A
(automatic), the calcula-
tor automatically inserts a decimal point be-
fore the last two digits as you enter numbers
for addition or subtraction, unless you manu-
ally enter the decimal point in a different lo-
cation. When you press
/T
(total), the
calculator rounds the result and displays only
two digits after the decimal point, even if you
manually entered more digits than that.
Note: This setting is perfect for totaling dol-
lars and cents because you do not need to
manually enter the decimal point in every
number. But be sure to press
00
if there are
no cents in an entry.
When you select
F
(floating), the decimal
point moves to whichever position is required
to display a precise answer for the calcula-
tion.
When you select
0, 2, 3,
or
4
, as you enter
numbers (without manually entering decimal
points), the calculator automatically adds
that many zeros after the decimal point.
Example: If you set the switch to
4
and enter
3258 +,
3'258.0000
appears.
When you manually enter digits after the
decimal point, if you enter fewer than the se-
lected number (
0
, 2, 3, or 4), the calculator
adds the required number of zeros to match
the selected number.
Example: If you set the switch to
2
and enter
842.3 –,
–842.30
appears.
When you press
/T
, the calculator automat-
ically rounds the result and display no more
than the selected number of digits after the
decimal point, even if you manually entered
numbers with more than the selected num-
ber of digits.
If you select
A, 0, 2, 3
, or
4
, the result might
be rounded off. To see the exact answer for
addition or subtraction problems, press
◊
/S
(subtotal). To see the rounded result, press
/T
.
For multiplication and division problems, only
manually-entered decimal digits display/print
before you press
=
. Then the calculator
rounds the product or quotient to the select-
ed decimal digit. For example, set the deci-
mal switch to
2
, then enter
2
÷
3 =
. Instead of
the actual result of 0.66666666667,
0.67
appears.
USING REFERENCE
NUMBERS
Use
#/P
at any point in a calculation to assign
a reference number to that calculation on the
printout. Reference numbers do not affect
calculations or results — they simply mark
the calculations so you can easily find them
again.
To assign a reference number to a calcula-
tion, enter the reference number you want to
use (up to 12 digits), then press
#/P
. The
printout shows
#
followed by the reference
number.
Example: To use a date for the reference
number, enter a decimal between the month
and day, and between the day and year. For
February 3, 2000, enter
2.3.2000
and press
#/
P
. The second decimal does not appear on
the display, but the calculator prints
#2
•
3
•
2000
.
USING THE +/– KEY
To change the displayed number from posi-
tive to negative or from negative to positive,
press
+/–
before you press one of the func-
tion keys.