Algebraic Expressions

Friday

Objectives

•I will model algebraic expressions.

•I will replace a variable with a given value and then evaluate the answer. •I will use the distributive property to rewrite an expression and simplify.

Write a variable expression for each model. Squares represent ones(1). Rectangles represent a variable (x).

1. 2.

3.

SPI 0606.1.5 Model algebraic expressions using algebra tiles.

SPI 0606.1.5 Model algebraic expressions using algebra tiles.

Write an algebraic expression to represent this model.

Answer: -3x +5

Evaluate each algebraic expression

1. 3m; where m = 9

2. 4y + 6; where y = 6

3. 2 (4e); where e = 5

4. 3pq; where p=3 and q = 5

5. 7n – (m + 18); where n = 4 and m = 10

Simplify each expression by combining like terms and complete all operations.

1. 2m + 8 + 12 +5m

2. 5(2m • 2) + 8m

SPI 0606.3.4 Rewrite expressions to represent quantities in different ways.

Simplify this expression and write the operations that were performed in each step.

4 (m + 8) + 5m

Simplify this expression and write the operations that were performed in each step.

4² (6n – 3n) + 85

Create your own expression for your partner to model/evaluate. The partners will have to model it correctly and write the operation that was performed.

Today

• You have learned how to evaluate and model algebraic expressions .

• You have reviewed, modeled, evaluated, and simplified expressions using the distributive model.

• You have used algebra tiles to model algebraic expressions.

• Give yourself a pat on the back!