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Order of Operations
What is Order of Operations and PEMDAS?


When you have equations and mathematical problems with many operations that you need to solve, it is important that you solve the operations in the correct order.

To explain it further, take an easy equation like 15 - 5 + 3 = ? It may be logical to do 15 - 5 equals 10 and then 10 + 3 equals 13. However, that is not the correct answer. You have to do addition before you do subtraction. So in this example, it should be 5 + 3 equals 8 and then you subtract 8 from 15 and the correct answer is 7.

Order of Operations

So you need to know the order of operations for not only addition and subtraction, but also parentheses, exponents, multiplication and division to solve mathematical problems correctly.

The order of operations is as follows:

1 - Parentheses
2 - Exponents and Roots
3 - Multiplication
4 - Division
5 - Addition
6 - Subtraction


There are many ways of remembering the order of operations. The most common way of remembering the Order of Operations is to memorize the acronym PEMDAS. What is PEMDAS? PEMDAS is the first letter of each operation above.



A lesser-known way of remembering the Order of Operations is "Please Excuse My Dear Aunt Sally."

Anyway, take the time to learn the Order of Operations so you do not make easy mathematical errors in the future.



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