Найти значение выражения 5/6+5/18-(3 7/9 - 2 13/15 ) =

Решаем пример по действиям:

1) 3 7/9 = (3 * 9 + 7)/9 = (27 + 7)/9 = 34/9;

2) 2 13/15 = (2 * 15 + 13)/15 = (30 + 13)/15 = 43/15;

3) 5/18 - 34/9 = 5/18 - 2 * 34/18 = (5 - 68)/18 = -63/18 = -21/6;

4) 5/6 - 21/6 = (5 - 21)/6 = -16/6 = -8/3;

5) -8/3 + 43/15 = -5 * 8/15 + 43/15 = (43 - 40)/15 = 3/15 = 1/5;

Ответ: 1/5.