Вопрос:

48. Вычислите: \(-2+\left(\frac{11}{24}+\frac{5}{6}\right):1\frac{15}{16}-\frac{2}{5}\).

Ответ:

\(\frac{11}{24}+\frac56=\frac{31}{24}\), \(1\frac{15}{16}=\frac{31}{16}\).

\(\frac{31}{24}:\frac{31}{16}=\frac23\).

\(-2+\frac23-\frac25=-\frac{26}{15}=-1\frac{11}{15}\).

Ответ: \(-1\frac{11}{15}\).