K) $$(2\frac{2}{7} + 1\frac{1}{7}) \cdot 1\frac{1}{6} = (\frac{16}{7} + \frac{8}{7}) \cdot \frac{7}{6} = \frac{24}{7} \cdot \frac{7}{6} = \frac{24 \cdot 7}{7 \cdot 6} = \frac{24}{6} = 4$$
Ответ: $$4$$