2) Вычислите: а) 1/8 + 3/5; б) 6/7 + 1/3; в) 4/5 + 1/2; г) 1 1/6 + 1 1/2; д) 4 2/7 + 6 3/5.

1. \(\frac{1}{8}+\frac{3}{5}=\frac{5}{40}+\frac{24}{40}=\frac{29}{40}\).
2. \(\frac{6}{7}+\frac{1}{3}=\frac{18}{21}+\frac{7}{21}=\frac{25}{21}=1\frac{4}{21}\).
3. \(\frac{4}{5}+\frac{1}{2}=\frac{8}{10}+\frac{5}{10}=\frac{13}{10}=1\frac{3}{10}\).
4. \(1\frac{1}{6}+1\frac{1}{2}=2+\frac{1}{6}+\frac{3}{6}=2\frac{4}{6}=2\frac{2}{3}\).
5. \(4\frac{2}{7}+6\frac{3}{5}=10+\frac{10}{35}+\frac{21}{35}=10\frac{31}{35}\).

Ответ: а) \(\frac{29}{40}\); б) \(1\frac{4}{21}\); в) \(1\frac{3}{10}\); г) \(2\frac{2}{3}\); д) \(10\frac{31}{35}\).