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Lesson 4-2 Pages 153-157
Powers and Exponents
Lesson Check 4-1
What you will learn!1. How to write expressions using exponents.
2. How to evaluate expressions containing exponents.
BaseBase
ExponentExponent
PowerPower
Standard formStandard form
Expanded formExpanded form
What you really need to know!
A number that is expressed using an exponent is called a power. The exponent tells you how many times to use the base as a factor.
34 = 3 x 3 x 3 x 3
What you really need to know!
Expressions involving powers are evaluated using order of operations. Powers are evaluated after any grouping symbols and before other multiplication or division operations.