Вычислите: (6/5 - 3/4) * 2/3

1. $\left(\frac{6}{5} - \frac{3}{4}\right) \cdot \frac{2}{3} = \left(\frac{24}{20} - \frac{15}{20}\right) \cdot \frac{2}{3} = \frac{9}{20} \cdot \frac{2}{3} = \frac{18}{60} = \frac{3}{10}$. **Ответ: 3/10** 2. $\left(\frac{5}{4} - \frac{1}{2}\right) \cdot \frac{3}{7} = \left(\frac{5}{4} - \frac{2}{4}\right) \cdot \frac{3}{7} = \frac{3}{4} \cdot \frac{3}{7} = \frac{9}{28}$. **Ответ: 9/28** 3. $\left(\frac{7}{6} + \frac{1}{3}\right) \cdot \frac{4}{5} = \left(\frac{7}{6} + \frac{2}{6}\right) \cdot \frac{4}{5} = \frac{9}{6} \cdot \frac{4}{5} = \frac{3}{2} \cdot \frac{4}{5} = \frac{12}{10} = \frac{6}{5}$ (или $1\frac{1}{5}$). **Ответ: 6/5** 4. $\left(\frac{3}{8} - \frac{1}{4}\right) \cdot \frac{5}{6} = \left(\frac{3}{8} - \frac{2}{8}\right) \cdot \frac{5}{6} = \frac{1}{8} \cdot \frac{5}{6} = \frac{5}{48}$. **Ответ: 5/48** 5. $\left(\frac{9}{10} + \frac{2}{5}\right) \cdot \frac{1}{2} = \left(\frac{9}{10} + \frac{4}{10}\right) \cdot \frac{1}{2} = \frac{13}{10} \cdot \frac{1}{2} = \frac{13}{20}$. **Ответ: 13/20**