7.U5A.L1-2.Variables and Algebraic Expressions

• 7th Grade

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.

1. 5
2. 5-2
3. 5+2
4. 2

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

1. we can't write an expression
2. we use the same expression
3. we can pick any amount for Camdyn
4. we can replace the amount with x

What do you remember about Variables? 

Variables

Which letter can be a variable?

1. any letter
2. no letters
3. x
4. 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