Question

решите пожалуйста даю 15 баллов!​

Answer 1

Ответ:

$\frac{2}{9} \div \frac{8}{10} = \frac{2}{9} \times \frac{10}{8} = \frac{2 \times 10}{9 \times 8} = \frac{5}{9 \times 2} = \frac{5}{18}$

$\frac{5}{18} - \frac{1}{2} = \frac{5}{18} - \frac{9}{18} = - \frac{4}{18} = - \frac{2}{9}$

$\frac{16}{10} \times \frac{1}{4} = \frac{4}{10} = \frac{2}{5}$

$- \frac{2}{9} \div \frac{2}{5} = - \frac{2}{9} \times \frac{5}{2} = - \frac{5}{9}$