Continue to use addition to subtract

Which addition fact is related to this subtraction fact?

17 - 9 = 8

• 8 + 9 = 17

• 7 + 7 =14

• 6 + 3 = 9

Which addition fact is related to this subtraction fact

12 - 5 = 7

• 6 + 2 = 8

• 5 + 7 = 12

• 10 + 10 = 20

Which addition fact help you to subtract

13 - 8 = ?

• 6 + 6 = 12

• 5 + 8 = 13

• 3 + 1 = 4

Find the missing number

9 + ? = 14

14 - ? = 9

• 5

• 1

• 0

Find the missing number

14 - ? = 8

8 + ? = 14

• 3

• 1

• 6