3) 2 1/4 · 2 2/27 + (3 1/6 + 4 5/6 · 11/29) · 1 1/15

Преобразуем смешанные числа:

\(2\frac{1}{4}\cdot2\frac{2}{27}=\frac{9}{4}\cdot\frac{56}{27}=\frac{14}{3}\).

\(3\frac{1}{6}+4\frac{5}{6}\cdot\frac{11}{29}=\frac{19}{6}+\frac{29}{6}\cdot\frac{11}{29}=\frac{19}{6}+\frac{11}{6}=5\).

\(\frac{14}{3}+5\cdot1\frac{1}{15}=\frac{14}{3}+5\cdot\frac{16}{15}=\frac{14}{3}+\frac{16}{3}=10\).

Ответ: 10