A4. Вычислите: \(3\frac{1}{5}:2\frac{2}{15}\). Варианты: 1) \(1\frac{1}{2}\); 2) \(\frac{2}{3}\); 3) \(1\frac{1}{3}\); 4) \(1\frac{2}{3}\).

\(3\frac{1}{5}=\frac{16}{5}\), \(2\frac{2}{15}=\frac{32}{15}\).

\[\frac{16}{5}:\frac{32}{15}=\frac{16}{5}\cdot\frac{15}{32}=\frac{3}{2}=1\frac{1}{2}.\]

Ответ: \(1\frac{1}{2}\), вариант 1.