Определи знаменатели равных дробей

а) \(\dfrac{1}{3}=\) [ ] \(=\) [ ] \(=\) [ ];

б) \(\dfrac{5}{6}=\) [ ] \(=\) [ ] \(=\) [ ];

в) \(\dfrac{2}{7}=\) [ ] \(=\) [ ] \(=\) [ ];

г) \(\dfrac{3}{10}=\) [ ] \(=\) [ ] \(=\) [ ].