(1)18 + 1 = (2)16+ 1 = (3)16 + 2 = (4)3 + 12 = (5)11 + 2 = (6)7 + 10 = (7)10 + 4 = (8)17 + 1 = (9)9 + 8 = (10)8 + 12 = (11)4 + 5 = (12)5 + 12 = (13)13 + 7 = (14)7 + 8 = (15)2 + 9 =