addition
12+5
what is 17
5-3
what is 2
1x2
what is 2
78+63
what is 141
1x1
what is 1
20+43
what is 63
14-8
what is 6
14x2
28
56+5
what is 61
5x10
what is 50
45+12
what is 57
67-57
what is 10
20x10
what is 200
54+65
what is 119
6x12
what is 72
67+89
what is 156
57-58
what is -1
30x3
what is 90
134+123
what is 257
12x13
what is 156
567+78
what is 645
678-58
what is 620
14x13
what is 182
6789+56
6845
2500x13
what is 32500