The phrase "Please Excuse My Dear Aunt Sally" is used by many students to remember the Order of Operations. The order in which operations should be performed is given below:

• Parentheses - Operations within parentheses and other groups should be simplified before all other operations.
• Exponents - Exponents and Roots should be simplified. Work these from left to right.
• Multiplication and Division - Operations involving multiplication and division should be simplified. Work these left to right.
• Addition and Subtraction - The last operations to be simplified are addition and subtraction. Work from left to right.