giúp mình so sánh nhé
\(1)\dfrac{-3}{5}=\dfrac{9}{-15};\dfrac{2}{-3}=\dfrac{10}{-15}.\\ \Rightarrow\dfrac{9}{-15}>\dfrac{10}{-15}.\\ \Rightarrow\dfrac{-3}{5}>\dfrac{2}{-3}.\)
\(2)\dfrac{-5}{9}=\dfrac{35}{-63};\dfrac{6}{-7}=\dfrac{54}{-63}.\\ \Rightarrow\dfrac{35}{-63}>\dfrac{54}{-63}.\\ \Rightarrow\dfrac{-5}{9}>\dfrac{6}{-7}.\)
\(3)\dfrac{7}{-9}=\dfrac{56}{-72};\dfrac{-5}{8}=\dfrac{45}{-72}.\\ \Rightarrow\dfrac{56}{-72}< \dfrac{45}{-72}.\\ \Rightarrow\dfrac{7}{-9}< \dfrac{-5}{8}.\)
\(4)\dfrac{-5}{11}=\dfrac{80}{-110};\dfrac{7}{-10}=\dfrac{77}{-110}.\\ \Rightarrow\dfrac{80}{-110}< \dfrac{77}{-110}.\\ \Rightarrow\dfrac{-5}{11}< \dfrac{7}{-10}.\)
