\(A=\left(-\dfrac{5}{9}\right).\dfrac{3}{11}+\left(-\dfrac{13}{18}\right).\dfrac{3}{11}=\dfrac{3}{11}\left(-\dfrac{5}{9}-\dfrac{13}{18}\right)\)
\(=\dfrac{3}{11}.\dfrac{-23}{18}=-\dfrac{23}{66}\)
\(A=\dfrac{3}{11}\left(-\dfrac{5}{9}-\dfrac{13}{18}\right)=\dfrac{3}{11}\left(-\dfrac{23}{18}\right)=-\dfrac{23}{66}\)