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20 questions
-40 + (-39)
1
-1
79
-79
-28 + (-90)
62
-62
-118
118
-7 - (-5) =
12
-12
-2
2
-3 - 5 =
-8
8
-5 - (-4) =
9
-9
-4 - 4 =
0
-2 - (-6) =
-4
4
-8 - (-7) =
13
-13
-12 - 16 =
-28
38
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