5. Вычислите: $$\frac{25}{12}:1\frac{7}{8} \times (4-2\frac{11}{18})$$.

Вычислим:

$$\frac{25}{12}:1\frac{7}{8} \times (4-2\frac{11}{18}) = \frac{25}{12}:\frac{15}{8} \times (4-\frac{47}{18}) = \frac{25}{12} \times \frac{8}{15} \times (\frac{72}{18}-\frac{47}{18}) = \frac{25}{12} \times \frac{8}{15} \times \frac{25}{18} = \frac{5}{3} \times \frac{2}{3} \times \frac{25}{9} = \frac{250}{81} = 3\frac{7}{81}$$

Ответ: $$3\frac{7}{81}$$