(1)80 + 10 = (2)30 + 20 = (3)40 + 40 = (4)50 + 30 = (5)60 + 10 = (6)80 + 10 = (7)40 + 30 = (8)20 + 60 = (9)20 + 20 = (10)40 + 40 = (11)60 + 10 = (12)20 + 10 = (13)60 + 20 = (14)30 + 40 = (15)50 + 10 =
