Восстанови запись

1. \(\dfrac{1}{5} \, \cdot \) [ ] \(= \dfrac{1}{10}\) .
2. \(\dfrac{5}{6} \, \cdot \) [ ] \(= \dfrac{5}{18}\) .
3. \(\dfrac{7}{9} \, \cdot \) [ ] \(= 1\) .
4. \(\dfrac{2}{7} \, \cdot \) [ ] \(= \dfrac{4}{49}\) .
5. \(\dfrac{4}{5} \, \cdot \) [ ] \(= \dfrac{8}{15}\) .
6. [ ] \( \cdot \, \dfrac{10}{11} = 1\) .