Chọn câu đúng:

Ta có:

\(\dfrac{{10}}{{11}} = \dfrac{{50}}{{55}}\) và \(\dfrac{{14}}{5} = \dfrac{{154}}{{55}}\). Vì \(\dfrac{{50}}{{55}} < \dfrac{{154}}{{55}}\) nên \(\dfrac{{10}}{{11}} < \dfrac{{14}}{5}\)

\(\dfrac{8}{{13}} = \dfrac{{16}}{{26}}\) và \(\dfrac{5}{2} = \dfrac{{65}}{{26}}\). Vì \(\dfrac{{16}}{{26}} < \dfrac{{65}}{{26}}\) nên \(\dfrac{8}{{13}} < \dfrac{5}{2}\)

\(\dfrac{7}{5} = \dfrac{{56}}{{40}}\) và \(\dfrac{7}{8} = \dfrac{{35}}{{40}}\). Vì \(\dfrac{{56}}{{40}} > \dfrac{{35}}{{40}}\) nên \(\dfrac{7}{5} > \dfrac{7}{8}\)

\(\dfrac{1}{5} = \dfrac{3}{{15}}\) và \(\dfrac{2}{3} = \dfrac{{10}}{{15}}\). Vì \(\dfrac{3}{{15}} < \dfrac{{10}}{{15}}\) nên \(\dfrac{1}{5} < \dfrac{2}{3}\).