Ответ:а) 8 − 3 6/7 = 7 7/7 − 3 6/7 = 4 1/7.б) 2 1/8 + 3 5/12 = 5 + 3/24 + 10/24 = 5 13/24.в) 5 13/15 + 1 7/12 = 6 + 52/60 + 35/60 = 7 27/60 = 7 9/20.г) 7 3/8 − 3 5/6 = 6 33/24 − 3 20/24 = 3 13/24.