Ответ:
- \(\frac{3}{8}+\frac{4}{9}=\frac{27}{72}+\frac{32}{72}=\frac{59}{72}\).
- \(\frac{7}{12}-\frac{3}{8}=\frac{14}{24}-\frac{9}{24}=\frac{5}{24}\).
- \(2\frac{5}{8}+1\frac{3}{10}=3+\frac{25}{40}+\frac{12}{40}=3\frac{37}{40}\).
- \(6\frac{7}{10}-4\frac{5}{12}=6\frac{42}{60}-4\frac{25}{60}=2\frac{17}{60}\).
