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Solve the math problem.

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17 - 4 =













11













-  6

20

- 2













7 - 5 =













8 - 8 =













19

-  0

19

- 6













18













-  1

19













-  2

15













-  1

9

- 7













17 - 6 =













17 - 2 =













16













-  5

12 - 5 =

8

- 7













15













-  5

6 - 6 =













8 - 2 =

14













-  0

12 - 3 =













13 - 7 =













18 - 9 =













9

- 9













4 - 2 =













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