Ответ:

  1. \(1\dfrac{2}{5}=\dfrac{7}{5}=\dfrac{14}{10}=\dfrac{21}{15}\).
  2. \(0.3=\dfrac{3}{10}=\dfrac{6}{20}=\dfrac{30}{100}\).
  3. \(-3\dfrac{1}{4}=-\dfrac{13}{4}=-\dfrac{26}{8}=-\dfrac{39}{12}\).
  4. \(-27=\dfrac{-27}{1}=\dfrac{-54}{2}=\dfrac{-81}{3}\).
  5. \(0=\dfrac{0}{1}=\dfrac{0}{2}=\dfrac{0}{10}\).

Ответ: \(\dfrac{7}{5},\dfrac{14}{10},\dfrac{21}{15};\ \dfrac{3}{10},\dfrac{6}{20},\dfrac{30}{100};\ -\dfrac{13}{4},-\dfrac{26}{8},-\dfrac{39}{12};\ \dfrac{-27}{1},\dfrac{-54}{2},\dfrac{-81}{3};\ \dfrac{0}{1},\dfrac{0}{2},\dfrac{0}{10}\).