Addition
1+-1
0
-5+6
-11
-20-13
-7
8x-2
-12
4/-2
-8
8+-10
-18
8--10
-2
-30-12
-19
12x-3
-36
8/-5
-40
10+-8
-18
45x-9
-415
-9-8
-1
13x-4
-52
9/-12
-3
12+-11
-23
-10/5
-2
-25-18
-13
15x-8
-120
-6/2
-12
-15+2
-17
100+230
330
-35--12
-23
50x-8
-400
-7/3
-21