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Solve the math problem.

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8 - 8 =













11













-  6

12 - 3 =













19

- 6













7 - 5 =













6 - 6 =













18













-  1

19

-  0

4 - 2 =













20

- 2













17 - 6 =













12 - 5 =

16













-  5

15













-  1

9

- 9













17 - 4 =













15













-  5

8

- 7













13 - 7 =













18 - 9 =













8 - 2 =

9

- 7













14













-  0

19













-  2

17 - 2 =













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