Вычислите: д) \(\dfrac{\left(6\dfrac{3}{5}-3\dfrac{3}{14}\right)\cdot 5\dfrac{5}{6}}{(21-1,25):2,5}\); е) \(\dfrac{2\dfrac{5}{8}-3\dfrac{2}{14}}{\left(3\dfrac{1}{12}+4,375\right):19\dfrac{8}{9}}\).

д)

\(6\dfrac{3}{5}-3\dfrac{3}{14}=\dfrac{33}{5}-\dfrac{45}{14}=\dfrac{237}{70}\).

\(\dfrac{237}{70}\cdot\dfrac{35}{6}=\dfrac{79}{4}\).

\((21-1,25):2,5=19,75:2,5=7,9=\dfrac{79}{10}\).

\(\dfrac{79}{4}:\dfrac{79}{10}=\dfrac{5}{2}=2,5\).

е)

\(2\dfrac{5}{8}-3\dfrac{2}{14}=\dfrac{21}{8}-\dfrac{23}{7}=-\dfrac{37}{56}\).

\(3\dfrac{1}{12}+4,375=\dfrac{37}{12}+\dfrac{35}{8}=\dfrac{109}{12}?\) При приведении к общему знаменателю: \(\dfrac{37}{12}+\dfrac{35}{8}=\dfrac{74+105}{24}=\dfrac{179}{24}\).

\(\left(\dfrac{179}{24}:\dfrac{179}{9}\right)=\dfrac{3}{8}\).

\(-\dfrac{37}{56}:\dfrac{3}{8}=-\dfrac{37}{21}\).

Ответ: д) \(2,5\); е) \(-\dfrac{37}{21}\).