1) \( \frac{3}{30} - (\frac{4}{6} - \frac{2}{5}) + (\frac{4}{9} - \frac{4}{9}) = \)

Решение:

1. \( \frac{4}{9} - \frac{4}{9} = 0 \)
2. \( \frac{4}{6} - \frac{2}{5} = \frac{2}{3} - \frac{2}{5} = \frac{10-6}{15} = \frac{4}{15} \)
3. \( \frac{3}{30} - \frac{4}{15} + 0 = \frac{1}{10} - \frac{8}{30} = \frac{3}{30} - \frac{8}{30} = -\frac{5}{30} = -\frac{1}{6} \)

Ответ: -\( \frac{1}{6} \).