345. Найдите произведение: 1) \frac{4}{29} \cdot 5 2) 12 \cdot \frac{3}{7} 3) 36 \cdot \frac{7}{18} 4) 9 \cdot \frac{5}{72}

Решение: 1) \(\frac{4}{29} \cdot 5 = \frac{4 \cdot 5}{29} = \frac{20}{29}\) 2) \(12 \cdot \frac{3}{7} = \frac{12 \cdot 3}{7} = \frac{36}{7} = 5\frac{1}{7}\) 3) \(36 \cdot \frac{7}{18} = \frac{36 \cdot 7}{18} = \frac{252}{18} = 14\) 4) \(9 \cdot \frac{5}{72} = \frac{9 \cdot 5}{72} = \frac{45}{72} = \frac{5}{8}\) Ответы: 1) \(\frac{20}{29}\) 2) \(5\frac{1}{7}\) 3) 14 4) \(\frac{5}{8}\)