1) (3 - 3,8) : 5 2/11 \(\cdot\) 3/17 + (18 - 8 2/3) : 1 1/6

Решение:

1. Первый пример:

1. \( 3 - 3,8 = -0,8 \)
2. \( -0,8 : 5\frac{2}{11} = -0,8 : \frac{57}{11} = -\frac{8}{10} \cdot \frac{11}{57} = -\frac{4}{5} \cdot \frac{11}{57} = -\frac{44}{285} \)
3. \( \frac{44}{285} \cdot \frac{3}{17} = \frac{44}{95 \cdot 17} = \frac{44}{1615} \)
4. \( 18 - 8\frac{2}{3} = 18 - \frac{26}{3} = \frac{54-26}{3} = \frac{28}{3} \)
5. \( \frac{28}{3} : 1\frac{1}{6} = \frac{28}{3} : \frac{7}{6} = \frac{28}{3} \cdot \frac{6}{7} = \frac{4}{1} \cdot \frac{2}{1} = 8 \)
6. \( -\frac{44}{1615} + 8 = 7 \frac{1571}{1615} \)

Ответ: 7 1571/1615