-4+ -8
-12
2+4
6
-2+1
-1
10+(-2)
8
-5+-5
-10
5+10
15
-5+4
5+(-4)
1
-8+-5
-13
7+7
14
-10+7
-3
7+(-10)
-20+-30
-50
20+30
50
-2+7
5
10+(-10)
0
-100+-25
-125
45+25
70
-10+20
10
3+(-10)
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