Casio SF-4990 User Manual page 73

•
— clears the calculator completely (except the calculator memory).
AC
•
Use to clear a value if you have not yet entered the operator following that
C
value.
•
Use the number keys (
point.
•
Use , ,
MC MR M
MC — clears the calculator memory.
MR — recalls the current calculator memory contents.
— subtracts the currently displayed value from the current memory
M @
contents. You can also press
result being subtracted from the memory contents.
— adds the currently displayed value to the current memory con-
M+
tents. You can also press
result being added to the memory contents.
•
Use !, @, # and $ to specify the arithmetic operation that is marked above
each key.
•
Use !/@ to change the sign.
•
= — executes a calculation and displays its result.
•
Use % for percentage calculations.
) to enter values. Press • to input a decimal
through
0 9
and for calculator memory operations.
M+
@
to execute a calculation, with the
M
@
to execute a calculation, with the
M+
Using the Calculator
71
E