Ответ:

Пошаговое объяснение:

1) 1/4 + 5/6 = 3/12 + 10/12 = 13/12 = 1 1/12

2) 3/4 - 2/9 = 27/36 - 8/36 = 19/36

3) 4 - 6/13 = 52/13 - 6/13 = 46/13= 3 7/13

4) 4 11/14 + 1 10/21 = 4 33/42 + 1 20/42 = 5 53/42 = 6 11/42

5) 13 2/9 - 4 3/5 = 13 10/45 - 4 27/45 = 12 55/45 - 4 27/45 = 8 28/45

6) 10 5/16 - 9 19/24 = 10 15/48 - 9 38/48 = 9 63/48 - 9 38/48 = 25/48