1) 11/21 - 3/35 = 385/735 - 63/735 = 322/7352) 19/60 - 8/45 = 285/900 - 320/900 = -35/9003) 3/20 - 2/25 + 1/30 = 225/1500 - 120/1500 + 50/1500 = 155/1500
1) 11/21 - 3/35 = 385/735 - 63/735 = 322/735
2) 19/60 - 8/45 = 285/900 - 320/900 = -35/900
3) 3/20 - 2/25 + 1/30 = 225/1500 - 120/1500 + 50/1500 = 155/1500