Ответ:
\(\frac{35}{39}\cdot\frac{13}{42}=\frac{5}{18}\).
\(\frac{5}{18}-\frac{1}{6}=\frac{5}{18}-\frac{3}{18}=\frac{1}{9}\).
Ответ: \(\frac{1}{9}\).
\(\frac{35}{39}\cdot\frac{13}{42}=\frac{5}{18}\).
\(\frac{5}{18}-\frac{1}{6}=\frac{5}{18}-\frac{3}{18}=\frac{1}{9}\).
Ответ: \(\frac{1}{9}\).