а) 1 - 3/4 = 4/4 - 3/4 = 1/4

б) 1 - 1/5 = 5/5 - 1/5 = 4/5

в) 1 - 2/5 = 5/5 - 2/5 = 3/5

г) 1 - 4/5 = 5/5 - 4/5 = 1/5

д) 1 - 7/10 = 10/10 - 7/10 = 3/10

е) 1 - 5/13 = 13/13 - 5/13 = 8/13

ж) 1 - 11/25 = 25/25 - 11/25 = 14/25

з) 1 - 25/25 = 25/25 - 25/25 (или 1 - 1, т.к. 25/25 = 1) = 0