1. Exponents and Order of Operations
Course 2 3-1

2. Exponents
An exponent tells how many times a number, or base, is used as a factor.
Power – a number that can be expressed as an exponent
125 is a power of 5 because it can be written as

3. Order of Operations
P Parentheses (simplify with in symbols of inclusion)
E Exponents
MD Multiplication and Division left to right
AS Addition and Subtraction left to right
Please Excuse My Dear Aunt Sally

4. The exponent applies to the thing directly beneath it.
= - 5 ∙ 5 ∙ 5 ∙ 5 = -625
(−5) 4 = (-5) ∙ (-5) ∙ (-5) ∙ (-5) = 625