2. Вычислите: a) \( 3\frac{1}{5} \cdot \frac{3}{1} \) б) \( 1\frac{4}{11} : 1\frac{2}{11} \) в) \( 2\frac{2}{5} : 2\frac{1}{5} \cdot 3\frac{3}{4} \)

2. Вычисление:

1. \( 3\frac{1}{5} \cdot \frac{3}{1} = \frac{16}{5} \cdot 3 = \frac{48}{5} = 9\frac{3}{5} \)
2. \( 1\frac{4}{11} : 1\frac{2}{11} = \frac{15}{11} : \frac{13}{11} = \frac{15}{11} \cdot \frac{11}{13} = \frac{15}{13} = 1\frac{2}{13} \)
3. \( 2\frac{2}{5} : 2\frac{1}{5} \cdot 3\frac{3}{4} = \frac{12}{5} : \frac{11}{5} \cdot \frac{15}{4} = \frac{12}{5} \cdot \frac{5}{11} \cdot \frac{15}{4} = \frac{12 \cdot 5 \cdot 15}{5 \cdot 11 \cdot 4} = \frac{12 \cdot 15}{11 \cdot 4} = \frac{3 \cdot 15}{11} = \frac{45}{11} = 4\frac{1}{11} \)

Ответ: 1) \( 9\frac{3}{5} \); 2) \( 1\frac{2}{13} \); 3) \( 4\frac{1}{11} \).