\(\dfrac{2}{3};\dfrac{4}{5};\dfrac{1}{2}=\dfrac{2}{3}=\dfrac{2\times10}{3\times10}=\dfrac{20}{30};\dfrac{4}{5}=\dfrac{4\times6}{5\times6}=\dfrac{24}{30};\dfrac{1}{2}=\dfrac{1\times15}{2\times15}=\dfrac{15}{30}\)
Trong này không tick đc 5 sao đâu
\(\dfrac{2}{3}=\dfrac{2.10}{3.10}=\dfrac{20}{30}\)
\(\dfrac{4}{5}=\dfrac{4.6}{5.6}=\dfrac{24}{30}\)
\(\dfrac{1}{2}=\dfrac{1.15}{2.15}=\dfrac{15}{30}\)