Question

What do you add to 5 7/8 to make 9

Answer 1

9-5 7/8 you would just subtract 5 7/8 from 9
8 8/8 - 5 7/8 borrow from 9 to have a common demonimator before subt.
3 1/8 is your answer.

Answer 2

29/8.........................................................hope this helps :D