Add by 10
2 + 10 =
28
12 - 10 =
2
17 - 5 =
12
12 + 4 =
16
10 - 4 =
6
12 + 10 =
22
20 - 10 =
10
20 + 10 =
30
16 + 5 =
21
15 - 2 =
13
17 + 10 =
27
25 - 10 =
15
20 - 10 =
10
21 + 7 =
28
29 - 7 =
22
29 + 10 =
36 - 10 =
26
52 + 7 =
59
46 + 3 =
49
35 - 5 =
30
55 + 10 =
65
73 - 10 =
63
78 + 6 =
84
69 + 4 =
73
57 - 6 =
51