Вычисли разность дробей в номерах 334 и 335.

- №334 а) $\frac{1}{4} - \frac{1}{5} = \frac{5}{20} - \frac{4}{2}0 = \frac{1}{20}$ б) $\frac{7}{9} - \frac{1}{4} = \frac{28}{36} - \frac{9}{36} = \frac{19}{36}$ в) $\frac{2}{3} - \frac{1}{7} = \frac{14}{21} - \frac{3}{21} = \frac{11}{21}$ г) $\frac{2}{3} - \frac{2}{11} = \frac{22}{33} - \frac{6}{33} = \frac{16}{33}$ - №335 а) $\frac{5}{6} - \frac{1}{15} = \frac{25}{30} - \frac{2}{30} = \frac{23}{30}$ б) $\frac{11}{12} - \frac{3}{8} = \frac{22}{24} - \frac{9}{24} = \frac{13}{24}$ в) $\frac{5}{9} - \frac{1}{6} = \frac{10}{18} - \frac{3}{18} = \frac{7}{18}$ г) $\frac{7}{6} - \frac{3}{10} = \frac{35}{30} - \frac{9}{30} = \frac{26}{30} = \frac{13}{15}$