5.358 Запишите в виде несократимой дроби: а) \(\frac{7\cdot4}{14\cdot3}\); б) \(\frac{2\cdot9}{9\cdot10}\); в) \(\frac{9\cdot7\cdot13}{7\cdot13\cdot18}\)

а) \(\frac{7\cdot4}{14\cdot3}\) = \(\frac{7\cdot4}{7\cdot2\cdot3}\) = \(\frac{4}{2\cdot3}\) = \(\frac{2\cdot2}{2\cdot3}\) = \(\frac{2}{3}\)

б) \(\frac{2\cdot9}{9\cdot10}\) = \(\frac{2}{10}\) = \(\frac{2}{2\cdot5}\) = \(\frac{1}{5}\)

в) \(\frac{9\cdot7\cdot13}{7\cdot13\cdot18}\) = \(\frac{9}{18}\) = \(\frac{9}{9\cdot2}\) = \(\frac{1}{2}\)

Ответ: а) \(\frac{2}{3}\); б) \(\frac{1}{5}\); в) \(\frac{1}{2}\)