Найдите значение выражения А)(2,75-9 5/6):(-1/3+3 1/6) Б) 1 2/3-(6 7/12-8 5/18):3,05

А) Превратим десятичную дробь в смешанную:2,75 = 2 75/100 = 2 3/4;1) 2 3/4 - 9 5/6 = 2 3*3/12 - 9 2*5/12 = 2 9/12 - 9 10/12 = - 7 1/12;2) - 1/3 + 3 1/6 = - 2*1/6 + 3 1/6 = - 2/6 + 3 1/6 = - 2/6 + 2 7/6 = 2 5/6;3) - 7 1/12 : 2 5/6 = - 85/12 : 17/6 = - 85/12 * 6/17 = - 5/2 * 1/1 = - 5/2 = - 2 1/2.Ответ: - 2 1/2.Б) 1) 6 7/12 - 8 5/18 = 6 3*7/36 - 8 2*5/36 = 6 21/36 - 8 10/36 = 6 21/36 - 7 46/36 = - 1 25/36;2) 3,05 = 3 5/100 = 3 1/20;3) - 1 25/36 : 3 1/20 = - 61/36 : 61/20 = - 61/36 * 20/61 = - 1/9 * 5/1 = - 5/9;4) 1 2/3 - (- 5/9) = 1 2/3 + 5/9 = 1 3*2/9 + 5/9 = 1 6/9 + 5/9 = 1 11/9 = 2 2/9.Ответ: 2 2/9.