\(=\left(-\dfrac{5}{4}+3+\dfrac{1}{3}\right)\cdot\dfrac{9}{10}=\dfrac{-15+36+4}{12}\cdot\dfrac{9}{10}=\dfrac{25}{12}\cdot\dfrac{9}{10}=\dfrac{225}{120}=\dfrac{15}{8}\)
\(\left(\dfrac{5}{-4}+3\dfrac{1}{3}\right):\dfrac{10}{9}\)
\(\left(\dfrac{-5}{4}+\dfrac{10}{3}\right).\dfrac{9}{10}\)
\(\dfrac{15}{8}\)
\(=\left(\dfrac{-5}{4}+\dfrac{10}{3}\right):\dfrac{10}{9}=\left(\dfrac{-15}{12}+\dfrac{40}{12}\right):\dfrac{10}{9}\\ =\dfrac{25}{12}:\dfrac{10}{9}=\dfrac{5\times3}{4\times2}=\dfrac{15}{8}\)
