1) 3/20 + 2/15 = (33)/(203) + (24)/(154) = 9/60 + 8/60 = 17/60
2) 17/32 - 5/12 = (173)/(323) - (58)/(128) = 51/96 - 40/96 = 11/96
3) 11/28 + 9/14 = (112)/(282) + 9/14 = 22/56 + 36/56 = 58/56 = 29/28
4) 35/36 - 41/45 = (355)/(365) - (414)/(454) = 175/180 - 164/180 = 11/180
5) 3 21/25 + 1 2/5 = 3 + 1 + 21/25 + 2/5 = 4 + 21/25 + 10/25 = 4 31/25 = 5 6/25
6) 4 13/16 - 2 3/8 = 4 - 2 + 13/16 - 3/8 = 2 + 13/16 - 2/16 = 2 13/16
7) 5 5/6 - 31/48 = 5 - 31/48 = 5 - 31/48 = 239/48
8) 6 4/7 - 2 37/77 = 6 - 2 + 4/7 - 37/77 = 4 + 4/7 - 37/77 = 4 615/539
1) 3/20 + 2/15 = (33)/(203) + (24)/(154) = 9/60 + 8/60 = 17/60
2) 17/32 - 5/12 = (173)/(323) - (58)/(128) = 51/96 - 40/96 = 11/96
3) 11/28 + 9/14 = (112)/(282) + 9/14 = 22/56 + 36/56 = 58/56 = 29/28
4) 35/36 - 41/45 = (355)/(365) - (414)/(454) = 175/180 - 164/180 = 11/180
5) 3 21/25 + 1 2/5 = 3 + 1 + 21/25 + 2/5 = 4 + 21/25 + 10/25 = 4 31/25 = 5 6/25
6) 4 13/16 - 2 3/8 = 4 - 2 + 13/16 - 3/8 = 2 + 13/16 - 2/16 = 2 13/16
7) 5 5/6 - 31/48 = 5 - 31/48 = 5 - 31/48 = 239/48
8) 6 4/7 - 2 37/77 = 6 - 2 + 4/7 - 37/77 = 4 + 4/7 - 37/77 = 4 615/539