\(\dfrac{5}{6}< \dfrac{9}{10}>\dfrac{7}{8}\)
MSC: 120
\(\dfrac{5}{6}=\dfrac{5.20}{6.20}=\dfrac{100}{120}\)
\(\dfrac{9}{10}=\dfrac{9.12}{10.12}=\dfrac{108}{120}\)
\(\dfrac{7}{8}=\dfrac{7.5}{8.15}=\dfrac{105}{120}\)
Ta có: \(\dfrac{108}{120}>\dfrac{105}{120}>\dfrac{100}{120}\)
=> \(\dfrac{9}{10}>\dfrac{7}{8}>\dfrac{5}{6}\)