Question

СРОЧНООО ДАЮ 10 БАЛЛОВ ​

Answer 1

$30 - 23.1 \div (5 \frac{7}{20} - 4 \frac{6}{35} )$

$30 - \frac{231}{10} \div ( \frac{107}{20} - \frac{146}{35} )$

$30 - \frac{231}{10} \div \frac{33}{28}$

$30 - \frac{231}{10} \times \frac{28}{33}$

$30 - \frac{7}{5} \times 14$

$30 - \frac{98}{5}$

$\frac{52}{5}$

или

$10 \frac{2}{5}$

или

$10.4$