Ответ:

  1. \(4\frac{1}{5}=\frac{4\cdot5+1}{5}=\frac{21}{5}\).
  2. \(8\frac{5}{11}=\frac{8\cdot11+5}{11}=\frac{93}{11}\).
  3. \(9\frac{5}{7}=\frac{9\cdot7+5}{7}=\frac{68}{7}\).
  4. \(5\frac{7}{18}=\frac{5\cdot18+7}{18}=\frac{97}{18}\).

Ответ: 1) \(\frac{21}{5}\); 2) \(\frac{93}{11}\); 3) \(\frac{68}{7}\); 4) \(\frac{97}{18}\).