Вычисли

а) \(\cfrac{^3/ \,1}{\,3}+\cfrac{7}{9}=\cfrac{3}{9}+\cfrac{7}{9}=\cfrac{10}{9}\) ;

б) \(\cfrac{3}{5}+\cfrac{1}{10}=\) [ ] \(+\) \(\cfrac{1}{10}=\) [ ];

в) \(\cfrac{1}{12}+\cfrac{5}{6}=\cfrac{1}{12}\) \(+\) [ ] \(=\) [ ];

г) \(\cfrac{3}{8}+\cfrac{1}{4}=\cfrac{3}{8}\) \(+\) [ ] \(=\) [ ];

д) \(\cfrac{5}{11}+\cfrac{5}{33}=\) [ ] \(+\) [ ] \(=\) [ ];

е) \(\cfrac{7}{60}+\cfrac{1}{15}=\) [ ] \(+\) [ ] \(=\) [ ].