What is 4 6/8 plus 8 9/10??

Question

I was sick when they explained this??

Answer 1

ever hear of googling "adding mixed numbers"?

4 6/8 + 8 9/10
= 4 30/40 + 8 36/40
= 4+8 + 30/40 + 36/40
= 12 66/40
= 13 26/40
= 13 13/20