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Problem : 7 - 19 = ?

-12

Problem : -5 - 6 = ?

-11

Problem : 8 - 12 = ?

-4

Problem : 7 + (- 4) = ?

3

Problem : 102 + (- 99) = ?

3

Problem : 54 - (- 16) = ?

70

Problem : 17 - (- 12) = ?

29

Problem : -9 - (- 10) = ?

1

Problem : 7×(- 8) = ?

-56

Problem : -11×(- 5)/5×(- 9) = ?

-99

Problem : 12/(- 4)×(- 3) = ?

9
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