Order of Operations:

To simplify the expression follow the order of operations: (PEMDAS)

1.      Evaluate the expressions inside the Parenthesis/Brackets (P).

2.      Evaluate Powers/Exponents (E).

3.      Multiply and/or Divide in order from left to right (MD).

4.      Add and/or Subtract in order from left to right (AS).

A simple technique for remembering the order of operations is turned into phrase

"Please Excuse My Dear Aunty Sally"

The expression is .

                (Replace x = 9, y = 4 and z = 12)

According order of operations inside the grouping symbols should be

evaluated first.

First operation is multiply the values inside the parenthesis.

      (Multiply: )

Next operation is subtraction.

                 (Subtract: )

Next operation is multiplication.

                     (Multiply: )

Next operation is subtraction.

                            (Subtract: )

The value of the expression is .