What is the order of math operations?

Answer 1

(You might remember this as "Please excuse my dear Aunt Sally.")1

1. Parentheses (or Brackets)
2. Exponents
3. Multiplication and Division left to right
4. Addition and Subtraction left to right

Answer 2

If there are any parenthesis, do operations within parenthesis first.

Then calculate all powers, from right to left.

Then calculate all multiplications and divisions, from left to right.

Then calculate all sums and differences, from left to right.