80 25/54 - (14,6+ 19* 1/38 * 2,2): 0,2 + 67 1/27 - 42 1/6

Решим пример по действиям:

1) 80 25/54 = (80 * 54 + 25)/54 = 4345/54;

2) 19* 1/38 * 22/10 = (19 * 22)/(38 * 10) = 11/10;

3) 14,6 + 11/10 = 146/10 + 11/10 = 157/10;

4) 157/10 : 0,2 = 157/10 : 2/10 = 157/2;

5) 4345/54 - 157/2 = 4345/54 - 4239/54 = (4345 - 4239)/54 = 53/27;

6) 67 1/27 = (67 * 27 + 1)/27 = (1809 + 1)/27 = 1810/27;

7) 53/27 + 1810/27 = (53 + 1810)/27 = 1863/27 = 69;

8) 69 - 42 1/6 = 69 - (42 * 6 + 1)/6 = 69 - 253/6 = 414/6 - 253/6 = (414 - 253)/6 = 161/6.

Ответ: 161/6.