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Hewlett-Packard 10B Tutorial
Page 2
If we did not press
is very important, since unwanted data in memory can result in improper calculations, and hence wrong
answers. It is best to get into the habit of automatically clearing memory before starting a calculation.
Occasionally, you may purposely want to save data, but, in general, you will be entering all new data, so
starting with a clear memory is the safest approach.
There are three different levels of clearing data:
CLEAR ALL
C
clears the entire display, but not the memory.
»
clears numbers on the display one at a time if you made a mistake entering data.
Changing the Display
Enter 5555.5555.
To change the number of decimal places from 2 to 4, press
To change from 4 places to 2, press
We usually set the display to 2 places, which is especially convenient when working with dollars and
percentages. However, we often use 4 places when dealing with interest rates and rates of return that are
entered as decimals.
If periods and commas are reversed, press
is just the opposite of ours.
Note that "PEND" means something is pending. For example, press
the denominator, so "PEND" appears in the display.
6
Enter
and = to get 0.67.
DISP
4
Press
DISP
2
Press
To control the brightness of the display, hold down
, we would input the data shown on the screen to memory. Clearing the calculator
clears all memory and the display.
DISP
to see 0.6667.
to shift back to 2 decimal places.
DISP
2
. 5,555.56 is displayed. (Rounding is automatic.)
./,
. (Many European countries use a ./, convention that
C
+
and press
4
. 5,555.5555 is displayed.
4
÷. The calculator is waiting for
-
or
.
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