1) 1 - 13/55 = 55/55 - 13/55 = (55 - 13)/55 = 42/552) 6 - 9/20 = 120/20 - 9/20 = (120 - 9)/20 = 111/203) 10 - 5 12/35 = 10 - (5 + 12/35) = 10 - (175/35 + 12/35) = 10 - 187/35 = (350 - 187)/35 = 163/354) 8 - 4 5/22 = 8 - (4 + 5/22) = 8 - (88/22 + 5/22) = 8 - 93/22 = (176 - 93)/22 = 83/22.
1) 1 - 13/55 = 55/55 - 13/55 = (55 - 13)/55 = 42/55
2) 6 - 9/20 = 120/20 - 9/20 = (120 - 9)/20 = 111/20
3) 10 - 5 12/35 = 10 - (5 + 12/35) = 10 - (175/35 + 12/35) = 10 - 187/35 = (350 - 187)/35 = 163/35
4) 8 - 4 5/22 = 8 - (4 + 5/22) = 8 - (88/22 + 5/22) = 8 - 93/22 = (176 - 93)/22 = 83/22.