Find the Unknown Number

? + 70 = 79

• 17

• 149

• 9

• 70

? + 54 = 55

• 10

• 1

• 109

• 99

?? + 27 = 42

• 15

• 14

• 13

• 17

?? + 23 = 39

• 15

• 16

• 17

• 62

?? + 21 = 47

• 6

• 16

• 26

• 36

? + 80 = 87

• 5

• 6

• 7

• 8

What is the length of the side with the ?

• 3 feet

• 5 feet

• 4 feet

• 13 feet

What number should fill in both of these blanks?

• 10

• 9

• 6

• 3

Look at the equation. What is the value of a?

5 X a = 35

• 6

• 30

• 5

• 7

Ms. Martell wrote this equation. What is the unknown factor?

n X 7 = 42

• 5

• 6

• 8

• 7