20 questions
8 - 3 =
5
6
7
9 - 3
5
6
7
7 - 1
4
5
6
10 - 2
6
7
8
8 - 4
4
5
6
3 - 0 =
0
3
30
6 - 6 =
0
6
12
6 - 4
1
2
3
9 - 5
3
4
5
4 - 1
2
3
4
10 - 4
4
5
6
8 - 2 =
4
5
6
9 - 1
8
9
3
6 - 5
1
5
2
7 - 7 =
0
7
14
5 - 3
2
3
8
7 - 4
3
4
5
10 - 5
2
5
4
9- 6
5
4
3
8 - 7 =
0
1
2