Evaluating Algebraic Expressions

Evaluating Algebraic Expressions

10/07/2020

Poll

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Lesson Objective

I can evaluate Algebraic Expressions by replacing variables with their given value and applying Order of Operations

Order of Operations

• Evaluate the expressions inside the grouping symbols.

• Evaluate all powers.

• Multiply and divide in order from left to right.

• Add and subtract in order from left to right.

Let's work together!

Open Ended

What is the first step in evaluating the following algebraic expression if w = 5 and v = 3?

 $8w-2v$  

Step 1 in Evaluating an Algebraic Expression!

Substitute, or replace, the variables with its assigned value.

Multiple Choice

What does our following expression look like after substituting the variables if w = 5 and v = 3?

 $8w\ -\ 2v$  

•  $8(3)-2(5)$ 

•  $8(5)-2(5)$  

•  $8\left(5\right)\ -\ 2\left(3\right)$  

•  $8(3)-2(3)$  

Open Ended

What is the second step in evaluating the following algebraic expression if w = 5 and v = 3?

 $8w-2v$  

Step 2 in Evaluating an Algebraic Expression

Perform the operation in the expression using the correct Order of Operations (PEMDAS)!

Multiple Choice

Find the value of the following if m = 8:

 $3+m$  

• 5

• -11

• 11

• -5

Multiple Choice

Find the value of the following if a = 2.

 $10a-3$  

• 23

• -23

• -17

• 17

Multiple Choice

Evaluate the following for x = -2 and y = -11:

 $4x^2-5y$  

• -71

• -39

• 39

• 71

Math Response

Evaluate: 12 + 7(-2h - 3) for h = -3

Type answer here

Correct Answer: 33

Deg^°

Rad