6 - 2 = ?
What is 4
9 - 3 = ?
What is 6
3 - 3 = ?
What is 0
3 - 1 = ?
What is 2
9 - 4 = ?
What is 5
6 - 5 = ?
What is 1
8 - 4 = ?
What is 4
5 - 4 = ?
What is 1
4 - 4 = ?
What is 0
9 - 8 = ?
What is 1
5 - 3 = ?
What is 2
7 - 4 = ?
What is 3
8 - 1 = ?
What is 7
0 - 0 = ?
What is 0