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Finding Missing Numbers | Subtraction within 20

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Fill in the missing number in each problem.

1.

− 1 = 7

2.

12 − = 6

3.

− 4 = 1

4.

9 − = 5

5.

− 5 = 10

6.

13 − = 11

7.

− 17 = 2

8.

9 − = 7

9.

− 5 = 9

10.

6 − = 3

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