6) 14/24 - 15/40 = 14/24 - 3/8 = 14/24 - 9/24 = 5/24
7) 12/18 - 5/60 = 2/3 - 1/12 = 8/12 - 1/12 = 7/12
8) 4/24 + 3/36 = 2/12 + 1/12 = 3/12 = 1/4
6) 14/24 - 15/40 = 14/24 - 3/8 = 14/24 - 9/24 = 5/24
7) 12/18 - 5/60 = 2/3 - 1/12 = 8/12 - 1/12 = 7/12
8) 4/24 + 3/36 = 2/12 + 1/12 = 3/12 = 1/4