So sánh \(\dfrac{2}{7}\) và \(\dfrac{1}{5}\).
\(\dfrac{2}{7}<\dfrac{1}{5}\)\(\dfrac{2}{7}>\dfrac{1}{5}\)\(\dfrac{2}{7}\leq\dfrac{1}{5}\)\(\dfrac{2}{7}\geq\dfrac{1}{5}\)Hướng dẫn giải:Ta có
\(\dfrac{2}{7}=\dfrac{10}{35}\\ \dfrac{1}{5}=\dfrac{7}{35}\)
Vì 10 > 7 nên \(\dfrac{10}{35}>\dfrac{7}{35}\). Do đó \(\dfrac{2}{7}>\dfrac{1}{5}\).
