.

Here are the solutions to the problems:

1. \(1 + 1 = 2\)
2. \(1 + 0 = 1\)
3. \(1 + 2 = 3\)
4. \(1 + 3 = 4\)
5. \(2 + 1 = 3\)
6. \(2 + 2 = 4\)
7. \(3 - 1 = 2\)
8. \(3 - 2 = 1\)