Addition/Subtraction with Missing Variables

3. Solve for z: 15 + z = 27

• 12

• 20

• 30

• 10

9. Solve for f: 22 + f = 35

• 13

• 10

• 18

• 25

Solve for x: 5 + x = 12

• 10

• 15

• 3

• 7

5. Solve for b: 12 + b = 25

• 20

• 15

• 13

• 10

What unknown number makes this equation true?

743 + 7 = 700 + _____

• 750

• 50

• 700

• A

• B

• C

Find each unknown. 123 + __ = 175

• 30

• 32

• 33

• 52

• 6

• 7

• 8

• 9

1+?=6

• 1

• 2

• 5

• 7

Juan had 32 bottle caps. After he gave some to his brother Dario, he had 17 left.

Which number sentence shows one way to find the number of bottle caps Juan gave to Dario?

• 32 ÷ 17 = ?

• 32 + ? = 17

• 32 + 17 = ?

• 32 - ? = 17