1. Vocabulary Section 1-2 Power: has two parts a base and an exponent.
Exponent: tells you how many times to multiply the base.
Base: large number in a power.
Simplify: a numerical expression when you replace it with its single numerical value.

2. Section 1-2: Order of Operations and Evaluating Expressions
Pearson Algebra I

3. I am learning to… Simplify expressions involving exponents.
Use the order of operations to evaluate expressions.

4. Example 1: Simplifying Powers
3 4
(0.5) 3

5. Key Concept: Order of Operations
Parentheses
Exponents
Multiplication
Division
Addition
Subtraction

6. Example 2: Simplifying a Numerical Expression
5∙7− 4 2 ÷2
12−25÷5 −2

7. Example 3: evaluating Algebraic Expressions
What is the value of each expression when a = 3 and b = 4.
3𝑏− 𝑎 2
2 𝑏 2 −7𝑎

8. Formative Assessments
Exits Slip: Evaluate the following expression for s = 2 and t = 5.
3𝑠(3) 11−5(𝑡) 2
Homework: page 13 #’s even