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Solve the math problem.

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19

- 6













8 - 2 =

6 - 6 =













11













-  6

9

- 7













8 - 8 =













19

-  0

20

- 2













18













-  1

8

- 7













14













-  0

13 - 7 =













17 - 6 =













15













-  5

17 - 4 =













19













-  2

7 - 5 =













12 - 5 =

4 - 2 =













18 - 9 =













15













-  1

9

- 9













17 - 2 =













16













-  5

12 - 3 =













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