1) 4 2/3 - 3 5/6 = 14/3 - 23/6 = 84/18- 69/18 = 15/18 = 5/6
2) 5/6 +2 7/8 = 5/6 + 23/8 = 40/48 + 138/48 = 178/48 = 89/24 = 3 17/24
ответ: 3 17/24
