3 + 8 - 6 3 + 8 - 8 9 - 9 8 + 0

Решение:

1. 3 + 8 - 6 = 11 - 6 = 5


2. 3 + 8 - 8 = 11 - 8 = 3


3. 9 - 9 = 0


4. 8 + 0 = 8