Ta có:5x11=55;4x13=52
Do 55>52
=>\(\dfrac{5}{13}>\dfrac{4}{11}\)
\(MSC:143\\ \dfrac{5}{13}=\dfrac{5\times11}{13\times11}=\dfrac{55}{143};\dfrac{4}{11}=\dfrac{4\times13}{11\times13}=\dfrac{52}{143}\\ 55>52\\ \Rightarrow\dfrac{5}{13}>\dfrac{4}{11}\)
Quy đồng:
\(\dfrac{5}{13}=\dfrac{5\times11}{13\times11}=\dfrac{55}{143}\)
\(\dfrac{4}{11}=\dfrac{4\times13}{11\times13}=\dfrac{52}{143}\)
Vì \(\dfrac{55}{143}>\dfrac{52}{143}\)
nên \(\dfrac{5}{13}>\dfrac{4}{11}\)
Học tốt nhé.