7. $\left(-\frac{2}{3}+\frac{5}{12}\right)-\frac{9}{20}$

Question

$Фото задания: 7. $\left(-\frac{2}{3}+\frac{5}{12}\right)-\frac{9}{20}$$ Фото задания

Accepted Answer

$-\frac{2}{3}+\frac{5}{12}=-\frac{8}{12}+\frac{5}{12}=-\frac{1}{4}$.

$-\frac{1}{4}-\frac{9}{20}=-\frac{5}{20}-\frac{9}{20}=-\frac{7}{10}$.

Ответ: $-\frac{7}{10}$.

7. \(\left(-\frac{2}{3}+\frac{5}{12}\right)-\frac{9}{20}\)