3 1/12-2 3/4*1 1/6-5/12. 6 7/12-5 11/5*1 3/17+10/17

Расставим действия:

2 1 3

3 1/12 - 2 3/4 * 1 1/6 - 5/12 =

1) 2 3/4 * 1 1/6 = 11/4 * 7/6 = 77/24;

2) 37/12 - 77/24 = 74/24 - 77/24 = - 3/24 = - 1/8;

3) - 1/8 - 5/12 = - 3/24 - 10/24 = - 13/24;

Расставим действия:

2 1 3

6 7/12 - 5 11/5 * 1 3/17 + 10/17 = - 1 61/204.

1) 5 11/5 * 1 3/17 = 36/5 * 20/17 = 36/1 * 4/17 = 144/17;

2) 6 7/12 - 144/17 = 79/12 - 144/17 = 1343/204 - 1728/204 = - 385/204

3) - 385/204 + 10/17 = - 385/204 + 120/204 = - 265/204 = - 1 61/204.