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Solve the math problem.

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20

- 2













8

- 7













17 - 4 =













8 - 2 =

12 - 3 =













15













-  5

7 - 5 =













13 - 7 =













8 - 8 =













16













-  5

18 - 9 =













12 - 5 =

4 - 2 =













18













-  1

19

-  0

6 - 6 =













19













-  2

15













-  1

19

- 6













9

- 9













11













-  6

17 - 6 =













17 - 2 =













14













-  0

9

- 7













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