5. Выполните действия: а) 1 5/19 · (6 − 3 5/8); б) 1 5/17 · (7 − 2 4/11).

а) \(1\frac{5}{19} = \frac{24}{19}\), \(3\frac{5}{8} = \frac{29}{8}\).

\(\frac{24}{19} \cdot (6 - \frac{29}{8}) = \frac{24}{19} \cdot \frac{19}{8} = 3\).

б) \(1\frac{5}{17} = \frac{22}{17}\), \(2\frac{4}{11} = \frac{26}{11}\).

\(\frac{22}{17} \cdot (7 - \frac{26}{11}) = \frac{22}{17} \cdot \frac{51}{11} = 6\).

Ответ: а) 3; б) 6.