1)how much do you need to subtract from 35/6 to make 5?
2) how much do you need to subtract from 67/10 to make 6
3) what do you need to add to 2 7/8 to make 6
4) what do you add to 4 5/7 to make 8
5) what do you add to 2 1/9 to make 4
( using lowest terms )