-
Bell Ringer
O Evaluate the following expression for s = 2
and t = 5.
3𝑠(3)
11 − 5(𝑡)
2
-
Section 1-2: Order of Operations and
Evaluating ExpressionsPearson Algebra I
-
I am learning to…
O Simplify expressions involving exponents.
O Use the order of operations to evaluate
expressions.
-
Vocabulary Section 1-2
O Power: has two parts a base and an
exponent.
O Exponent: tells you how many times to
multiply the base.
O Base: large number in a power.
O Simplify: a numerical expression when you
replace it with its single numerical value.
-
Example 1: Simplifying Powers
O 34
O2
3
3
O (0.5)3
-
Key Concept: Order of Operations
O Parentheses
O Exponents
O Multiplication
O Division
O Addition
O Subtraction
-
Example 2: Simplifying a Numerical Expression
O 5 ∙ 7 − 42 ÷ 2
O 12 − 25 ÷ 5
O4+34
7−2
-
Example 3: evaluating Algebraic Expressions
O What is the value of each expression when a
= 3 and b = 4.
a) 3𝑏 − 𝑎2
b) 2𝑏2 − 7𝑎
-
Formative Assessments
O Homework: page 13 #’s 10-34 even