1) 2/3 + 1 1/5 =

1) 2/3 + 1 1/5 = 2/3 + 6/5 = (2*5)/(3*5) + (6*3)/(5*3) = 10/15 + 18/15 = (10+18)/15 = 28/15 = 1 13/15