Задание

Соедини элементы

\(\dfrac{3}{10} + \dfrac{7}{40}\) \(\dfrac{19}{40}\)
\(\dfrac{2}{5} + \dfrac{2}{5}\) \(\dfrac{5}{6}\)
\(\dfrac{7}{8} - \dfrac{1}{2}\) \(\dfrac{4}{5}\)
\(\dfrac{3}{7} - \dfrac{6}{14}\) \(\dfrac{3}{8}\)
\(\dfrac{1}{6} + \dfrac{2}{3}\) \(0\)