В) (2 − 1/2 − 1/8) · (3/5 − 1/2 · 5/6) · 1/3

Решение:

\( (2 - \frac{1}{2} - \frac{1}{8}) \cdot (\frac{3}{5} - \frac{1}{2} \cdot \frac{5}{6}) \cdot \frac{1}{3} \)

1. \( 2 - \frac{1}{2} - \frac{1}{8} = \frac{16}{8} - \frac{4}{8} - \frac{1}{8} = \frac{11}{8} \)
2. \( \frac{1}{2} \cdot \frac{5}{6} = \frac{5}{12} \)
3. \( \frac{3}{5} - \frac{5}{12} = \frac{36}{60} - \frac{25}{60} = \frac{11}{60} \)
4. \( \frac{11}{8} \cdot \frac{11}{60} \cdot \frac{1}{3} = \frac{121}{1440} \)

Ответ: \( \frac{121}{1440} \)