Ответ: а) \(\frac{15}{77}\); б) \(\frac{108}{125}\); в) \(\frac{8}{7}\); г) \(\frac{3}{2}\); д) 2; е) \(\frac{26}{3}\)
Решение:
а) \(\frac{3}{7} \cdot \frac{5}{11} = \frac{3 \cdot 5}{7 \cdot 11} = \frac{15}{77}\)
б) \(\frac{6}{25} : \frac{5}{18} = \frac{6}{25} \cdot \frac{18}{5} = \frac{6 \cdot 18}{25 \cdot 5} = \frac{108}{125}\)
в) \(\frac{4}{7} \cdot 2 = \frac{4 \cdot 2}{7} = \frac{8}{7}\)
г) \(\frac{5}{9} : \frac{10}{27} = \frac{5}{9} \cdot \frac{27}{10} = \frac{5 \cdot 27}{9 \cdot 10} = \frac{135}{90} = \frac{3}{2}\)
д) \(12 : 6 = 2\)
е) \(4 : \frac{6}{13} = 4 \cdot \frac{13}{6} = \frac{4 \cdot 13}{6} = \frac{52}{6} = \frac{26}{3}\)
Ответ: а) \(\frac{15}{77}\); б) \(\frac{108}{125}\); в) \(\frac{8}{7}\); г) \(\frac{3}{2}\); д) 2; е) \(\frac{26}{3}\)