f) \(\dfrac{-7}{8}:\dfrac{21}{16}-\dfrac{5}{3}.\left(\dfrac{1}{5}-\dfrac{7}{10}\right)\)
\(=\dfrac{-7}{8}:\dfrac{21}{16}-\dfrac{5}{3}.\dfrac{-1}{2}\)
\(=\dfrac{-2}{3}-\dfrac{-5}{6}\)
\(=\)\(\dfrac{1}{6}\)
g) \(\dfrac{1}{5}\left(\dfrac{1}{2}-\dfrac{1}{3}\right):\left(\dfrac{-9}{10}\right)+\dfrac{-7}{3}\)
\(=\dfrac{1}{5}.\dfrac{1}{6}:\left(\dfrac{-9}{10}\right)+\dfrac{-7}{3}\)
\(=\dfrac{1}{30}:\left(\dfrac{-9}{10}\right)+\dfrac{-7}{3}\)
\(=\dfrac{-1}{27}+\dfrac{-7}{3}\)
\(=\dfrac{-64}{27}\)
