Ответ:
\[\frac{1}{3}+\frac{5}{6}=\frac{2}{6}+\frac{5}{6}=\frac{7}{6}\]
\[\frac{2}{5}\cdot\frac{7}{6}=\frac{14}{30}=\frac{7}{15}\]
Ответ: \(\frac{7}{15}\).
\[\frac{1}{3}+\frac{5}{6}=\frac{2}{6}+\frac{5}{6}=\frac{7}{6}\]
\[\frac{2}{5}\cdot\frac{7}{6}=\frac{14}{30}=\frac{7}{15}\]
Ответ: \(\frac{7}{15}\).