# What is PEMDAS?

Oct 26, 2014

PEMDAS is an mnemonic device used to remind students of the order of operations in the calculation of a mathematical problem.

The initials also o along with phrase used by many students and teachers, Please Excuse My Dear Aunt Sally.

P = Parenthesis (brackets)
E = Exponents
M = Multiply
D = Divide
S = Subtraction

Solve inside Parenthesis, then do Exponents, Multiply and Divide before you Add and Subtract.

A sample problem may look like this.

${3}^{2} \left(5\right) \left(6 - 2\right) + 8$

Following the order of operations

Parenthesis first
${3}^{2} \left(5\right) \left(4\right) + 8$

Exponents next
$9 \left(5\right) \left(4\right) + 8$

Multiply and Divide now
$900 + 8$

$908$