find the sum and difference.write your answer in your notebook.express the answer in lowest term.
1. 10/12-2/3=
2. 11/12-1/3=
3. 1/2-2/5=
4. 1/6+ 3/5=
5. 5/8+1/2=
6. 5/16 + 3/4=
7. 2/4- 9/20=
8. 12/28+11/35=​