Find the sum or difference. Reduce your answer to the simplest form.

1) 1/3 + 1/9

2) 1/4 + 7/8

3) 5/8 – 1/2

4) 2/3 – 1/6

5) 1/3 + 7/12

6) 1/2 + 4/5

7) 5/6 – 3/4

8) 3/4 + 5/6