Решение:
- a) \( \frac{1}{3} - \frac{1}{6} = \frac{2}{6} - \frac{1}{6} = \frac{1}{6} \)
- б) \( \frac{9}{14} - \frac{2}{7} = \frac{9}{14} - \frac{4}{14} = \frac{5}{14} \)
- в) \( \frac{19}{100} - \frac{1}{10} = \frac{19}{100} - \frac{10}{100} = \frac{9}{100} \)
Ответ: а) 1/6, б) 5/14, в) 9/100