Adding
31 + 72
103
56-21
44
6 x 4
24
3/12 + 6/12
9/12 or 1/4
36/3
12
517 + 44
561
682-400
282
14 x 6
84
8/20 + 7/20
15/20 or 3/4
55/11
5
926 + 736
1,662
527-143
384
17 x 5
85
6/11 + 4/11
10/11
72/9
8
292 + 571 + 23
886
702-274
428
45x3
135
4/6 + 2/6
1
5
762+264
1,026
971-52
919
46 x 2
92
2/15 + 10/15
12/15
90/5
18