c: \(\dfrac{1}{5}+\left|-\dfrac{4}{5}\right|=\dfrac{1}{5}+\dfrac{4}{5}=\dfrac{5}{5}=1\)
d: \(\dfrac{11}{7}\cdot\left(-\dfrac{1}{9}\right)+\dfrac{11}{7}\cdot\left(-\dfrac{2}{3}\right)\)
\(=\dfrac{11}{7}\left(-\dfrac{1}{9}-\dfrac{2}{3}\right)\)
\(=\dfrac{11}{7}\left(-\dfrac{1}{9}-\dfrac{6}{9}\right)\)
\(=\dfrac{11}{7}\cdot\dfrac{-7}{9}=-\dfrac{11}{9}\)