Question

Найдите значение выражения
(11/21-6/7):5/42

Answer 1

$\frac{11}{21} - \frac{6}{7} = \frac{11}{21} - \frac{18}{21} = - \frac{7}{21} = - \frac{1}{3}$

$- \frac{1}{3} \div \frac{5}{42} = - \frac{1}{3} \times \frac{42}{5} = - \frac{14}{5} \\ = - 2 \frac{4}{5} = - 2.8$