Subtraction practice

Solve each problem. Use the scratch space if you need it.

1. 7 - 6=____
2. 3 - 3=____
3. 7 - 6=____
4. 1 - 1=____
5. 5 - 4=____
6. 10 - 8=____
7. 1 - 1=____
8. 6 - 1=____