Giải thích các bước giải:
Ta có : $BCNN(44,18,36)=396$
$\to$Quy đồng :
$\dfrac{-3}{44}=\dfrac{-3.9}{44.9}=\dfrac{-27}{396}$
$\dfrac{-11}{18}=\dfrac{-11.22}{18.22}=\dfrac{-242}{396}$
$\dfrac{5}{-36}=\dfrac{5.11}{-36.11}=\dfrac{55}{-396}=\dfrac{-55}{396}$