Помогите решить два примера пожалуйста
б) = 8 7/30
в) = 3 3/4
в) 7 5/12 - (1 5/8 + 2 1/24) = 7 10/24 - ( 1 15/24 + 2 1/24 ) = 7 10/24 - 3 16/24 = 6 34/24 - 3 16/24 = 3 18/24 = 3 3/4
б) 4 2/5 + 3 5/6 = 4 12/30 + 3 25/30 = 7 37/30 = 8 7/30
4 2/5 + 3 5/6 = (4 + 3) + (2/5 + 5/6) = 7 + 37/30 = 7 + 1 7/10 = 7 + 1 + 7/30 = 8 + 7/30 = 8 7/30 в. 89/12 - ((1 + 2) + (5/8 + 1/24)) = 89/12 - (3 + 2/3) = 89/12 - 3 2/3 = 89/12 - 11/3 = 3,75