10. Заполните недостающие числа.

Решение:

1. \[ \frac{2}{3} + \frac{1}{6} = \frac{4}{6} + \frac{1}{6} = \frac{5}{6} \]
2. \[ \frac{2}{7} + \frac{1}{10} = \frac{20}{70} + \frac{7}{70} = \frac{27}{70} \]
3. \[ \frac{3}{16} + \frac{9}{20} = \frac{15}{80} + \frac{36}{80} = \frac{51}{80} \]
4. \[ \frac{5}{8} + \frac{11}{12} = \frac{15}{24} + \frac{22}{24} = \frac{37}{24} \]
5. \[ \frac{11}{5} + \frac{18}{36} = \frac{11}{5} + \frac{1}{2} = \frac{22}{10} + \frac{5}{10} = \frac{27}{10} \]
6. \[ \frac{9}{10} - \frac{7}{8} = \frac{36}{40} - \frac{35}{40} = \frac{1}{40} \]
7. \[ \frac{7}{22} - \frac{3}{55} = \frac{35}{110} - \frac{6}{110} = \frac{29}{110} \]