2 câu trả lời
-49và
Ta có: -4/9 = (-4 . 13) / ( 9.13) = -52/117
-3/13 = (-3.9) /( 13.9) = -27/117
Vì -52<-27 nên -52/117>-27/117
#AC
#andy
\begin{array}{l} \dfrac{{ - 4}}{9}\,\,và\,\,\dfrac{{ - 3}}{{13}}\\ MC:117\\ = \dfrac{{ - 4.13}}{{9.13}}\,\,và\,\,\dfrac{{ - 3.9}}{{13.9}}\\ = \dfrac{{ - 52}}{{117}}\,\,và\,\dfrac{{ - 27}}{{117}}\\ Vì:\,\, - 52 < - 27\\ \Rightarrow \dfrac{{ - 52}}{{117}} < \dfrac{{ - 27}}{{117}}\\ \Rightarrow \dfrac{{ - 4}}{9}\, < \,\dfrac{{ - 3}}{{13}} \end{array}