Вычисли

а) \(\cfrac{^4/ \,1}{\,3}+\cfrac{^3/ \,1}{\,4}=\cfrac{4}{12}+\cfrac{3}{12}=\cfrac{7}{12}\) ;

б) \(\dfrac{^5/ \,1}{\,6}+\dfrac{^6/ \,2}{\,5}=\) [ ] \(+\) [ ] \(=\) [ ];

в) \(\dfrac{5}{7}+\dfrac{1}{6}=\) [ ] \(+\) [ ] \(=\) [ ];

г) \(\dfrac{7}{8}+\dfrac{1}{7}=\) [ ] \(+\) [ ] \(=\) [ ];

д) \(\dfrac{3}{4}+\dfrac{1}{3}=\) [ ] \(+\) [ ] \(=\) [ ];

е) \(\dfrac{5}{11}+\dfrac{3}{10}=\) [ ] \(+\) [ ] \(=\) [ ].