2 3/4: (1 1/2 - 2/5) + (3/4+5/6) : 3 1/6. Решите и расспишите по действиям

Расставим действия:

3 1 5 2 4

2 3/4 : (1 1/2 - 2/5) + (3/4 + 5/6) : 3 1/6 = 3.

1) 1 1/2 - 2/5 = 3/2 - 2/5 = 15/10 - 4/10 = 11/10;

2) 3/4 + 5/6 = 9/12 + 10/12 = 19/12;

3) 2 3/4 : 11/10 = 11/4 : 11/10 = 11/4 * 10/11 = 10/4;

4) 19/12 : 3 1/6 = 19/12 : 19/6 = 19/12 * 6/19 = 6/12 = 1/2;

5) 10/4 + 1/2 = 10/4 + 2/4 = 12/4 = 3.