1+3
4
3-66
63
1x1
1
6+5
11
100-50
50
1x10
10
111+7
118
3-5
2
1x100
100
66+1
67
fill in the blank
6-_=9
17
20x5
444+55
499
fill the blank
3-_=2
5
5x4
20