Давайте решим эти примеры по порядку:
1. $$8 - 5 - 2 = 3 - 2 = 1$$
2. $$10 - 7 - 2 = 3 - 2 = 1$$
3. $$10 - 8 - 2 = 2 - 2 = 0$$
4. $$0 + 9 - 8 = 9 - 8 = 1$$
5. $$8 + 2 - 4 = 10 - 4 = 6$$
6. $$6 + 0 - 5 = 6 - 5 = 1$$
7. $$8 - 6 + 10 = 2 + 10 = 12$$
8. $$7 - 5 + 10 = 2 + 10 = 12$$
9. $$9 - 7 + 10 = 2 + 10 = 12$$
10. $$7 + 3 + 2 = 10 + 2 = 12$$
11. $$8 + 2 + 3 = 10 + 3 = 13$$