\(\dfrac{-3}{4}-\dfrac{2}{9}.\left(-3\right)^2+\dfrac{5}{8}:5\) \(=\dfrac{-3}{4}-\dfrac{2}{9}.9+\dfrac{5}{8}.\dfrac{1}{5}\) \(=\dfrac{-3}{4}-2+\dfrac{1}{8}=\dfrac{-6}{8}-\dfrac{16}{8}+\dfrac{1}{8}=\dfrac{-21}{8}\)
\(\dfrac{-3}{4}-\dfrac{2}{9}.\left(-3\right)^2+\dfrac{5}{8}:5\)
= \(\dfrac{-3}{4}-\dfrac{2}{9}.9+\dfrac{5}{8}.\dfrac{1}{5}\)
= \(\dfrac{-3}{4}-2+\dfrac{1}{8}\)
= \(\dfrac{-21}{8}\)
\(\dfrac{-3}{4}-\dfrac{2}{9}\cdot\left(-3\right)^2+\dfrac{5}{8}:5\)
\(=\dfrac{-3}{4}-\dfrac{2}{9}\cdot9+\dfrac{5}{8}\cdot\dfrac{1}{5}\)
\(=\dfrac{-3}{4}-\dfrac{2\cdot9}{9\cdot1}+\dfrac{5\cdot1}{8\cdot5}\)
\(=\dfrac{-3}{4}-2+\dfrac{1}{8}\)
\(=\dfrac{-6}{8}-\dfrac{16}{8}+\dfrac{1}{8}\)
\(=\dfrac{-6-16+1}{8}\)
\(=\dfrac{-21}{8}\)
\(\dfrac{-3}{4}-\dfrac{2}{9}\cdot\left(-3\right)^2+\dfrac{5}{8}:5=\dfrac{-3}{4}-\dfrac{2}{9}\cdot9+\dfrac{5}{8}\cdot\dfrac{1}{5}\)
\(=\dfrac{-3}{4}-\dfrac{2\cdot9}{9\cdot1}+\dfrac{5\cdot1}{8\cdot5}=\dfrac{-3}{4}-2+\dfrac{1}{8}\)
\(=\dfrac{-6}{8}-\dfrac{16}{8}+\dfrac{1}{8}=\dfrac{-6-16+1}{8}=\dfrac{-21}{8}\)
