Задание

Вычисли

а) \cfrac{^2/ \,1}{\,3}-\cfrac{1}{6}=\cfrac{2}{6}-\dfrac{1}{6}=\dfrac{1}{6};

б) \dfrac{3}{5}-\dfrac{2}{15}= -\dfrac{2}{15}= ;

в) \dfrac{9}{12}-\dfrac{1}{3}=\dfrac{9}{12}- = ;

г) \dfrac{7}{16}-\dfrac{1}{4}=\dfrac{7}{16}- = ;

д) \dfrac{11}{13}-\dfrac{5}{26}= - = ;

е) \dfrac{61}{60}-\dfrac{1}{2}= - = .