Пошаговое объяснение:
5 3/4 - 1 7/12 = 5 9/12 - 1 7/12 = 4 1/6
4 1/6 : 4 1/6 = 1
1 x 9 3/7 = 9 3/7
9 3/7 - 2 1/14 = 9 6/14 - 2 1/14 = 7 5/14
