Add and Subtract Expressions Lessons

Adding & Subtracting Expressions Review

Multiple Choice

What are the coefficients in an expression?

• The numbers multiplied by the variables

• The operations in the expression

• The constants in the expression

• The exponents in the expression

Multiple Choice

What are the coefficients in the expression 8x - 3 + 12xy?

• -3, 8, 12

• x, y

• 8, 12

• There are no coefficients in this expression

Multiple Choice

A number on its own that does not change and is without a variable is known as a _______________.

• Term
• Variable
• Coefficient
• Constant

Multiple Choice

Identify the constants in the expression:

7 - 5x + 1

• 7

• 1

• 7 & 1

• 5

Adding Linear Expressions

• Get rid of the parentheses

• Combine like terms

• We can do this because the plus sign in between the sums when distributed keeps all the signs the same

Fill in the Blanks

Simplify.

Multiple Choice

Simplify

• -10x -7

• -10x - 8

• 10x + 8

• 9x - 9

Subtracting Expressions

Multiple Choice

Find the difference:
(8 - u) - (5u + 1)

• 6u + 7 
• -4u + 7
• -6u + 7
• 4u - 7

Multiple Choice

(5x - 6) - (x + 2)

• 4x - 8
• 4x - 4
• 4x + 4

Multiple Choice

Find the difference:
(2x + 7) - 3(5x - 4)

• -13x - 5
• 17x + 5
• 17x + 5
• -13x + 19

Fill in the Blanks

A company sets up a food booth and a game booth at the county fair. The fee for the food booth is $100 plus $5 per day. The fee for the game booth is $50 plus $7 per day.

1. Write an expression for how much both booths will cost for the same number of days.