3. Вычислите: a) \(\frac{3}{11}\)+\(\frac{5}{11}\); б) \(\frac{2}{3}\)-\(\frac{3}{5}\); в) \(\frac{7}{16}\)+\(\frac{1}{2}\); г) \(\frac{5}{12}\)-\(\frac{2}{15}\).

3. Вычисление:

1. \( \frac{3}{11}+\frac{5}{11} = \frac{3+5}{11} = \frac{8}{11} \)
2. \( \frac{2}{3}-\frac{3}{5} = \frac{10}{15}-\frac{9}{15} = \frac{1}{15} \)
3. \( \frac{7}{16}+\frac{1}{2} = \frac{7}{16}+\frac{8}{16} = \frac{15}{16} \)
4. \( \frac{5}{12}-\frac{2}{15} = \frac{25}{60}-\frac{8}{60} = \frac{17}{60} \)