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Вычиcли:

а) \(\cfrac{2}{5}\cdot 2=\cfrac{4}{5}\) ;

б) \(-\cfrac{14}{15}:2=-\cfrac{7}{15}\) ;

в) \(-\cfrac{4}{15}\cdot 5=\) [ ];

г) \(\cfrac{4}{5}:(-4)=\) [ ];

д) \(\cfrac{1}{7}\cdot (-3)=\) [ ];

е) \(-\cfrac{2}{25}:(-2)=\) [ ];

ж) \(-\cfrac{2}{15}\cdot (-4)=\) [ ];

з) \(-\cfrac{17}{15}:\left(-\cfrac{17}{15}\right)=\) [ ];

и) \(-\cfrac{4}{5}\cdot \cfrac{5}{4}=\) [ ].