Вычислите: 3/5 + 1/2; 7/8 − 1/4; 5/6 + 2/9; 11/12 − 3/8; 1/2 + 1/3 + 1/6.

1. \(\frac{3}{5}+\frac{1}{2}=\frac{6}{10}+\frac{5}{10}=\frac{11}{10}=1\frac{1}{10}\).
2. \(\frac{7}{8}-\frac{1}{4}=\frac{7}{8}-\frac{2}{8}=\frac{5}{8}\).
3. \(\frac{5}{6}+\frac{2}{9}=\frac{15}{18}+\frac{4}{18}=\frac{19}{18}=1\frac{1}{18}\).
4. \(\frac{11}{12}-\frac{3}{8}=\frac{22}{24}-\frac{9}{24}=\frac{13}{24}\).
5. \(\frac{1}{2}+\frac{1}{3}+\frac{1}{6}=\frac{3}{6}+\frac{2}{6}+\frac{1}{6}=\frac{6}{6}=1\).

Ответ: 1\(\frac{1}{10}\); \(\frac{5}{8}\); 1\(\frac{1}{18}\); \(\frac{13}{24}\); 1.