Вычислите 1) 1-13/55= 2)6-9/20= 3)10-5 12/35= 4)8-4 5/22

1 - 13/55 = 55/55 - 13/55 = 42/55
6 - 9/20 = 5 20/20 - 9/20 = 5 11/20
10 - 5 12/35 = 9 35/35 - 5 12/35 = 4 23/35
8 - 4 5/22 = 7 22/22 - 4 5/22 = 3 17/22