Решение:
Выполним вычитание дробей:
- \( \frac{5}{15} - \frac{3}{20} = \frac{1}{3} - \frac{3}{20} = \frac{20 - 9}{60} = \frac{11}{60} \)
- \( \frac{4}{12} - \frac{2}{9} = \frac{1}{3} - \frac{2}{9} = \frac{3 - 2}{9} = \frac{1}{9} \)
- \( \frac{6}{7} - \frac{3}{14} = \frac{12 - 3}{14} = \frac{9}{14} \)
- \( \frac{7}{7} - \frac{4}{3} = 1 - \frac{4}{3} = \frac{3 - 4}{3} = -\frac{1}{3} \)
- \( 3\frac{2}{3} - 3\frac{4}{11} = \frac{11}{3} - \frac{37}{11} = \frac{121 - 111}{33} = \frac{10}{33} \)
- \( 7\frac{5}{12} - 3\frac{2}{9} = 7\frac{15}{36} - 3\frac{8}{36} = 4\frac{7}{36} \)