Ответ:
- \(\frac{4}{5}\cdot\frac{1}{2}=\frac{4}{10}=\frac{2}{5}\).
- \(\frac{3}{7}\cdot\frac{6}{7}=\frac{18}{49}\).
- \(\frac{1}{2}\cdot\frac{3}{4}=\frac{3}{8}\).
- \(\frac{5}{7}\cdot\frac{5}{7}=\frac{25}{49}\).
- \(\frac{8}{11}\cdot\frac{16}{77}=\frac{128}{847}\).
- \(\frac{5}{23}\cdot\frac{15}{46}=\frac{75}{1058}\).
- \(\frac{14}{25}\cdot\frac{21}{50}=\frac{294}{1250}=\frac{147}{625}\).
- \(\frac{18}{20}\cdot\frac{27}{40}=\frac{486}{800}=\frac{243}{400}\).
- \(\frac{63}{70}\cdot\frac{81}{270}=\frac{5103}{18900}=\frac{27}{100}\).
- \(\frac{2}{33}\cdot\frac{24}{30}=\frac{48}{990}=\frac{8}{165}\).
