19) 5/6 + 3/7 · 14/27 =

\(\frac{3}{7}\cdot\frac{14}{27}=\frac{2}{9}\); \(\frac{5}{6}+\frac{2}{9}=\frac{15}{18}+\frac{4}{18}=\frac{19}{18}\).

Ответ: \(\frac{19}{18}\)