Ответ:

Пошаговое объяснение:

1) 2 1/6 - 1 2/9 : 3 2/3= 13/6 - 11/9 *3/11= 13/6 - 1/3= 13/6 - 2/6= 11/6= 1 5/6

2) 4 2/5 : (7/10 + 2 3/5)= 22/5 : (7/10 + 26/10)= 22/5 * 10/33= 4/3= 1 1/3

3) 7 * (2/3)³ : (4/9)²= 7 * 8/27 : 16/81 = 7 * 3/2= 21/2= 10 1/2

4) 5/7 :(15/28 * 2/9)= 5/7 : 5/42= 5/7 * 42/5= 6

5) 2 1/4 : (3/8 : 1/2)= 9/4 * 4/3=3

6) 1 1/2 : ( 1 1/4 : 1 2/3) : 1 1/5= 3/2 * 3/4 * 5/6= 15/16