1) 4/5 - 3/10 = (42)/(52) - 3/10 = 8/10 - 3/10 = 5/10 = 1/22) 1/12 + 1/10 = (15)/(125) + (16)/(106) = 5/60 + 6/60 = 11/603) 9/20 - 1/30 = (93)/(203) - 1/30 = 27/60 - 2/60 = 25/60 = 5/12
1) 4/5 - 3/10 = (42)/(52) - 3/10 = 8/10 - 3/10 = 5/10 = 1/2
2) 1/12 + 1/10 = (15)/(125) + (16)/(106) = 5/60 + 6/60 = 11/60
3) 9/20 - 1/30 = (93)/(203) - 1/30 = 27/60 - 2/60 = 25/60 = 5/12