Binary operations (adding, subtracting, multiplying, and dividing) are entered in the calculator as you would write them on paper. For example, to add 34 and 7 type

Unary operations (operations that require only one input) are also entered as you would write them. To find the square root of 25, type

To find the sine of type

To find log 100, type

The order of operations is programmed into the calculator. It performs the operations just as in algebra. The expression, 1 + 2 x 3 is calculated as 1 + (2 x 3). Since parentheses always have the highest priority, use extra parentheses whenever in doubt. The expressions

are not equal.

The negative sign should not be confused with the subtraction sign. When subtracting two numbers use the key and when negating a number use the key.