Unit 5A, Lesson 1 and 2

Variables and Algebraic Expressions

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7th Grade

This lesson contains **8 slides**, with **interactive quizzes** and **text slides**.

Unit 5A, Lesson 1 and 2

Variables and Algebraic Expressions

Camdyn earns 5 dollars per hour for housework. Nick earns 2 more dollars an hour. Pick the expression that matches the amount Nick earns per hour.

A

5

B

5-2

C

5+2

D

2

What if we don't know how much Camdyn earns? How would that change our expression?

A

we can't write an expression

B

we use the same expression

C

we can pick any amount for Camdyn

D

we can replace the amount with x

What do you remember about Variables?

Variables

Which letter can be a variable?

A

any letter

B

no letters

C

x

D

y

Match the expression with the word phrases

three more than a number

eight goes into a number

the product of six and a number

fifteen less than a number

x+3

y/8

6n

z-15

Identify the terms, the constants, and the coefficients of the following expression.

30x+10

Find and Combine the Like Terms

y + 1.2y + 1.2z

2 + 17x – 5x + 9

3(5y + 6) – 4