Question

Giúp tớ vs, thanks!

Answer 1

a: \(=\dfrac{-5}{4}\cdot\left(13+\dfrac{7}{11}\right)-\dfrac{5}{4}\cdot\left(6+\dfrac{4}{11}\right)\)

\(=\dfrac{-5}{4}\left(13+\dfrac{7}{11}+6+\dfrac{4}{11}\right)=\dfrac{-5}{4}\cdot20=-25\)

b: \(=\dfrac{3}{4}\cdot\left(-2\right)+\dfrac{9}{4}\cdot\left(-2\right)\)

\(=-2\cdot3=-6\)

c: \(=\dfrac{28}{25}:\dfrac{3}{2}:\dfrac{7}{50}:\dfrac{14}{55}\)

\(=\dfrac{28}{25}\cdot\dfrac{2}{3}\cdot\dfrac{50}{7}\cdot\dfrac{55}{14}\)

\(=\dfrac{28}{7\cdot14}\cdot\dfrac{50}{25}\cdot2\cdot\dfrac{55}{3}\)

\(=\dfrac{2}{7}\cdot2\cdot2\cdot\dfrac{55}{3}=\dfrac{8}{7}\cdot\dfrac{55}{3}=\dfrac{440}{21}\)