write the answers in simplest form.3/4+5/8 and 3/5+1/10+1/4 and 5/8-3/16+4/3

I'll do the first one for you.

3/4+5/8

Change to equivalent fraction with the same denominator

6/8 + 5/8 = 11/8

Simplify.

11/8 = 1 3/8

I'll be glad to check your answers to the other two problems.