Unit 4 Summative Review

Solve: m + 9 = 20

• 11
• 2
• 22
• 10

Solve: 4b =28

• 57
• 7
• 9
• 4

Solve: d/3 = 9

• 14
• 3
• 27
• 12

14 is subtracted from y

• 14 + y
• 14/y
• 14 - 7
• y - 14

The school cafeteria is a rectangle with a length of 20 and an area of 400. What is the width?

• 13

• 15

• 10

• 20

What does "addition is the inverse of subtraction mean?

• They are opposite operations and you can use them to undo each other.

• They are not friends.

• Mathematically irregular.

To solve equations...

• Ask a friend
• start on the side with the variable
• Always subtract
• Always add

Solve: m + 22 = 40

• 24

• 2

• 22

• 10

Solve: s - 15 =15

• 30
• 45
• 75
• 12

Solve: 4b = 12

• 3

• 7

• 9

• 4