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10 questions
4 + (-5) =
9
-9
1
-1
15 - 10 =
25
5
-5
-25
-15 + 8
-7
-6
-8
10 - (-7) =
3
7
17
-17
5 - 8 =
13
-3
-13
-20 ÷\div÷ 5 =
-4
4
-100
100
-30 ÷\div÷ -10=
-30
30
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