Fundamental Operation; Cal Mode; Formula Storage Function - Casio FX-890P Owner's Manual

2 Fundamental Operation

This section covers the various modes available with the computer using a series of
simple examples. These procedures should be mastered before attempting more
complex operations.

2.1 CAL Mode

The CAL mode is in effect each time the power of the unit is switched ON. Arithmetic
calculations, function calculations, formula storage calculations, program execution
can be performed in this mode.
EXAMPLE:
2.5+3.5-2=
OPERATION:
2 . 5 + 3 . 5 - 2 .
The touch . . is used instead of the = key, operation is identical to that used in a
standard calculator.
The CAL mode can be entered from another mode by pressing the CAL key.

2.2 Formula Storage Function

The formula storage function makes it possible to store often-used formulas in
memory for calculation when values are assigned to variables. This function is
applied in the CAL mode using the IN , OUT , and CALC keys.
EXAMPLE:
Determining the selling price of a product by applying a profit rate based on the
purchase price and selling price.
SELLING PRICE = PURCHASE PRICE / (1 – PROFIT%)
KEY INPUT
CAL
S E L L = P U R C H A S E / ( 1 - P R O F I T )
Ensure that input of the formula is correct by pressing the OUT key.
OPERATION:
OUT
.
3.5+3.5–2
4
SELL=PURCHASE/(1–PROFIT)
SELL=PURCHASE/(1–PROFIT)_
15
IN.