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Solve the math problem.

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9

- 7













4 - 2 =













14













-  0

8

- 7













19

-  0

17 - 2 =













7 - 5 =













17 - 6 =













16













-  5

18













-  1

12 - 5 =

13 - 7 =













11













-  6

18 - 9 =













15













-  1

19













-  2

17 - 4 =













19

- 6













20

- 2













8 - 2 =

12 - 3 =













9

- 9













8 - 8 =













15













-  5

6 - 6 =













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