4 5/12+1 1/12: (6 5/8-3 11/12) * 4 1/6

Расставим действия:

4 2 1 3

4 5/12 + 1 1/12 : (6 5/8 - 3 11/12) * 4 1/6 = 53/12 + 13/12 : 65/24 * 25/6 = 53/12 + 26/65 *

* 25/6 = 53/12 + 65/39 = 73/12 = 6 1/12.

1) 6 5/8 - 3 11/12 = 53/8 - 47/12 = 159/24 - 94/24 = 65/24;

2) 1 1/12 : 65/24 = 13/12 : 65/24 = 13/12 * 24/65 = 312/780 = 26/65;

3) 26/65 * 4 1/6 = 26/65 * 25/6 = 650/390 = 65/39;

4) 4 5/12 + 65/39 = 53/12 + 65/39 = 689/156 + 260/156 = 949/156 = 73/12 = 6 1/12.