Addition
3+3=
6
9-8=
1
10+10=
20
32-12=
20
1, 2, _, 4, 5, _, 7
3 and 6
6+4=
10
6-3=
3
17+30=
47
86-40=
5,6,7,8, _, _, _,
9, 10, 11
8+9=
17
9-3=
6
66+30=
96
79-44=
35
2, _, 6, 8, 10
4
7+7=
14
10-7=
3
86+39=
125
99-13=
86
5, 10, 15, 20, _, 30
25
8+7=
15
20-9=
11
38+95=
133
83-9=
74
13, 14, 15, 16, _, _, _,
17, 18,19