2. \(\frac{3}{6} - \frac{2}{6} = \frac{1}{6}\) <br> 4. \(\frac{1}{8} - \frac{2}{8} = -\frac{1}{8}\) <br> 6. \(\frac{5}{10} - \frac{4}{10} = \frac{1}{10}\) <br> 8. \(\frac{6}{11} - \frac{3}{11} = \frac{3}{11}\) <br> 10. \(\frac{1}{7} - \frac{4}{7} = -\frac{3}{7}\) <br> 12. \(\frac{8}{12} - \frac{3}{12} = \frac{5}{12}\) <br> 14. \(\frac{11}{25} - \frac{7}{25} = \frac{4}{25}\) <br> 16. \(\frac{4}{13} - \frac{5}{13} = -\frac{1}{13}\) <br> 18. \(\frac{13}{25} - \frac{6}{25} = \frac{7}{25}\) <br> 20. \(\frac{11}{13} - \frac{9}{13} = \frac{2}{13}\)

Решение:

Для вычитания дробей с одинаковыми знаменателями нужно вычесть числитель первой дроби из числителя второй дроби, а знаменатель оставить прежним.

1. \(\frac{3}{6} - \frac{2}{6} = \frac{3-2}{6} = \frac{1}{6}\)
2. \(\frac{1}{8} - \frac{2}{8} = \frac{1-2}{8} = \frac{-1}{8}\)
3. \(\frac{5}{10} - \frac{4}{10} = \frac{5-4}{10} = \frac{1}{10}\)
4. \(\frac{6}{11} - \frac{3}{11} = \frac{6-3}{11} = \frac{3}{11}\)
5. \(\frac{1}{7} - \frac{4}{7} = \frac{1-4}{7} = \frac{-3}{7}\)
6. \(\frac{8}{12} - \frac{3}{12} = \frac{8-3}{12} = \frac{5}{12}\)
7. \(\frac{11}{25} - \frac{7}{25} = \frac{11-7}{25} = \frac{4}{25}\)
8. \(\frac{4}{13} - \frac{5}{13} = \frac{4-5}{13} = \frac{-1}{13}\)
9. \(\frac{13}{25} - \frac{6}{25} = \frac{13-6}{25} = \frac{7}{25}\)
10. \(\frac{11}{13} - \frac{9}{13} = \frac{11-9}{13} = \frac{2}{13}\)

Ответ:
2. \(\frac{1}{6}\)
4. \(-\frac{1}{8}\)
6. \(\frac{1}{10}\)
8. \(\frac{3}{11}\)
10. \(-\frac{3}{7}\)
12. \(\frac{5}{12}\)
14. \(\frac{4}{25}\)
16. \(-\frac{1}{13}\)
18. \(\frac{7}{25}\)
20. \(\frac{2}{13}\)