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Вычисли разность:

а) \(\cfrac{5}{7}-\cfrac{3}{7}=\) [ ];

б) \(\cfrac{8}{9}-\cfrac{5}{9}=\) [ ];

в) \(-\cfrac{5}{11}-\left(-\cfrac{3}{11}\right)=\) [ ];

г) \(-\cfrac{11}{13}-\left(-\cfrac{7}{13}\right)=\) [ ];

д) \(\cfrac{1}{17}-\left(-\cfrac{3}{17}\right)=\) [ ];

е) \(-\cfrac{1}{15}-\cfrac{1}{15}=\) [ ];

ж) \(0-\cfrac{3}{4}=\) [ ];

з) \(0-\left(-\cfrac{8}{7}\right)=\) [ ];

и) \(-\cfrac{5}{11}-\left(-\cfrac{5}{11}\right)=\) [ ].