Выполнить действия: (3 6/7-2 5/7-4-7)+(4 2/3+2/3-4 1/3)

Вычислим значение выражения: 

(3 6/7 - 2 5/7 - 4 - 7) + (4 2/3 + 2/3 - 4 1/3) = (3 + 6/7 - 2 - 5/7 - 4 - 7) + (4 + 2/3 + 2/3 - 4 - 1/3) = (1 + 6/7  - 5/7 - 11) + (2/3 + 2/3  - 1/3) = -10 + (6 - 5)/7 + 2/3 + 2/3 - 1/3 = -10 + 1/7 + 2/3 + 2/3 - 1/3 = -10 + 1/7 + (2 + 2 - 1)/3 = -10 + 1/7 + (4 - 1)/3 = -10 + 1/7 + 3/3 = -10 + 1/7 + 1 = -9 + 1/7 = -8 - 1 + 1/7 = -8 - 7/7 + 1/7 = -8 - 6/7 = -8 6/7; 

Значит, (3 6/7 - 2 5/7 - 4 - 7) + (4 2/3 + 2/3 - 4 1/3) = -8 6/7.