(1) Quy đồng: \(\dfrac{3}{5}=\dfrac{12}{20};\dfrac{7}{10}=\dfrac{14}{20};\dfrac{11}{20}\)
Sắp xếp: \(\dfrac{11}{20}< \dfrac{12}{20}< \dfrac{14}{20}\)
hay \(\dfrac{11}{20}< \dfrac{3}{5}< \dfrac{7}{10}\)
(2) Quy đồng: \(\dfrac{2}{3}=\dfrac{18}{27};\dfrac{7}{9}=\dfrac{21}{27};\dfrac{22}{27}\)
Sắp xếp: \(\dfrac{18}{27}< \dfrac{21}{27}< \dfrac{22}{27}\)
hay \(\dfrac{2}{3}< \dfrac{7}{9}< \dfrac{22}{27}\)