Ответ:

5/6 + 2 3/4 : 4 8/9 * 2 2/3 - 1 2/3 + (5/38 * 1 1/3 - 10/57) = 2/3

1) 5/38 * 1 1/3= 5/38 * 4/3 = (5*2)/(19*3) = 10/57

2) 10/57 - 10/57 = 0

3) 2 3/4 : 4 8/9 = 11/4 : 44/9 = 11/4 * 9/44 = (1*9)/(4*4) = 9/16

4) 9/16 * 2 2/3 = 9/16 * 8/3 = (3*1)/(2*1) = 3/2 = 1 1/2

5) 5/6 + 1 1/2 = 5/6 + 1 3/6 = 1 8/6 = 2 2/6 = 2 1/3

6) 2 1/3 - 1 2/3 = 1 4/3 - 1 2/3 = 2/3

7) 2/3 + 0 = 2/3

Пошаговое объяснение: