Group 1
12 + 9 =
21
23 + 8 =
31
19 + 8 =
27
30 + 9 =
39
20 - 5 =
18 - 7 =
40 - 3 =
26 - 5 =
20 + 10 =
30
10 + 34 =
44
10 + 85 =
95
27 + 10 =
28 - 14 =
14
56 - 24 =
32
88 - 43 =
45
99 - 22 =
77
64 - 15 =
49
82 - 23 =
59
71 - 15 =
56
64 - 18 =
46