Выполните действия (2 2/3+1 5/6): 11/2

(2 2/3 + 1 5/6) : 11/2 = 9/11

1) 2 2/3 + 1 5/6 = 2 4/6 + 1 5/6 = 3 9/6 = 4 3/6 = 4 1/2
2) 4 1/2 : 11/2 = 9/2 * 2/11 = 9/11

Пояснения:
2/3 = 4/6 - доп.множ. 2
3/6 = 1/2 - сократили на 3
4 1/2 = (4*2+1)/2 = 9/2