(1)16 - 4 = (2)12 - 2 = (3)11 - 1 = (4)12 - 2 = (5)14 - 3 = (6)13 - 2 = (7)17 - 4 = (8)18 - 6 = (9)12 - 1 = (10)15 - 4 = (11)17 - 3 = (12)15 - 5 = (13)19 - 9 = (14)15 - 2 = (15)14 - 1 =
