find the sum and difference. Express the answer in lowest term. Write your answer in your notebook
1. 8/8 - 5/8 =
2. 6/12 + 4/6 =
3. 8/15 + 3/15 =
4. 10/18 - 3/9 =
5. 4/20 + 7/15 =
6. 4/5 - 15/25 =
7. 5 3/4 - 3 5/6 =
8. 6 5/9 - 3 2/3 =
9. 7 3/10 + 9 12/15 =​