8) $\left(\frac{10}{21}-\frac{25}{28}\right):\left(-\frac{11}{14}+\frac{24}{35}\right)$;

Question

$Фото задания: 8) $\left(\frac{10}{21}-\frac{25}{28}\right):\left(-\frac{11}{14}+\frac{24}{35}\right)$;$ Фото задания

Accepted Answer

$\frac{10}{21}-\frac{25}{28}=\frac{40-75}{84}=-\frac{35}{84}=-\frac{5}{12}$.

$-\frac{11}{14}+\frac{24}{35}=\frac{-55+48}{70}=-\frac{7}{70}=-\frac{1}{10}$.

$-\frac{5}{12}:\left(-\frac{1}{10}\right)=\frac{5}{12}\cdot10=\frac{25}{6}=4\frac{1}{6}$.

Ответ: $\frac{25}{6}=4\frac{1}{6}$.

8) \(\left(\frac{10}{21}-\frac{25}{28}\right):\left(-\frac{11}{14}+\frac{24}{35}\right)\);