HP HP-15C - Manual Solutions

The HP-15C: A Problem Solver 13
The display format used in this handbook is • 4 (the decimal point is
    
calculator does not show four decimal places, you may want to press
´• 4 to match the displays in the examples.
Manual Solutions
Run through the following two-number calculations. It is not necessary to
clear the calculator between problems. If you enter a digit incorrectly, press
− to undo the mistake, then key in the correct number.
To Compute
Keystrokes
Display
9 - 6 = 3
9 v 6 -
3.0000
9 × 6 = 54
9 v 6 *
54.0000
9 ÷ 6 = 1.5
9 v 6 ÷
1.5000
9
6
= 531,441
9 v 6 Y
531,441.0000
Notice that in the four examples:

Both numbers are in the calculator before you press the function key.

v is used only to separate two numbers that are keyed in one
after the other.

Pressing a numeric function key, in this case - * ÷ or Y,
executes the function immediately and displays the result.
To see the close relationship between manual and programmed problem
solving, let's first calculate the solution to a problem manually, that is, from
the keyboard. Then we'll use a program to calculate the solution to the same
problem with different data.