1 addition
10 + 2 =
12
20 - 10
10
40 + 20
60
60 - 30
30
1 + 1 =
2
20 + 4 =
24
30 - 10
20
46 + 3
49
28 - 4
24
4 + 4 =
8
22 + 10 =
32
24 - 10 =
14
35 + 7 =
42
42 - 8
34
7 + 7 =
14
31 + 20 =
51
36 - 20
16
23 + 34
57
37 - 14
23
8 + 8 =
16
18 + 50 =
68
75 - 40
35
56 + 15
71
74 - 28 =
46
9 + 9 =
18