Question

Answer 1

b: \(=\dfrac{7}{3}-\dfrac{1}{3}\cdot\left[\dfrac{-3}{2}+\dfrac{2}{3}+2\right]\)

\(=\dfrac{7}{3}-\dfrac{1}{3}\cdot\dfrac{-9+4+12}{6}\)

\(=\dfrac{7}{3}-\dfrac{1}{3}\cdot\dfrac{7}{6}\)

\(=\dfrac{42}{18}-\dfrac{7}{18}=\dfrac{35}{18}\)

c: \(=\left(20+9+\dfrac{1}{4}\right):2.25\)

\(=\dfrac{29.25}{2.25}=13\)