Calcule les quotients ci-dessous : \begin{multicols}{2} \begin{myenumerate} \item $\dfrac13\div\dfrac54=$ \item $\dfrac37\div\dfrac75=$ \item $\dfrac{-2}3\div\dfrac54=$ \item $\dfrac32\div\dfrac{-5}8=$ \item $\dfrac{-9}5\div\dfrac7{-8}=$ \item $\dfrac{12}7\div\dfrac57=$ \item $\dfrac98\div\dfrac{-8}{9}=$ \item $\dfrac{-2}7\div\dfrac3{14}=$ \end{myenumerate} \end{multicols}