Keying in Negative Numbers ( & )
key changes the sign of a number.
To key in a negative number, type that number, then press
To change the sign of an already displayed number (it must be the
rightmost number), press
Using the Menu Keys
The calculator usually displays a set of labels across the bottom of the
display. The set is called a menu because it presents you with choices.
The MAIN menu is the starting point for all other menus.
1: Getting Started
Use parentheses to impose
an order of calculation.
Changes the sign of 75.
Multiplies －75 by 7.1.