Question

[Cao Trần Anh Khôi]

cứu

Answer 1

[Nguyễn Lê Phước Thịnh]

a: \(=\left(-\dfrac{40}{20}\cdot\dfrac{17}{51}\cdot\dfrac{8}{25}\right)\cdot\dfrac{75}{64}=\dfrac{-2}{3}\cdot\dfrac{8}{25}\cdot\dfrac{75}{64}\)

\(=\dfrac{-2}{3}\cdot\dfrac{1}{8}\cdot3=-\dfrac{1}{4}\)

b: \(=28\left(\dfrac{3}{14}-\dfrac{13}{21}+\dfrac{29}{42}\right)-8=28\cdot\dfrac{2}{7}-8=8-8=0\)

c: \(=\dfrac{\dfrac{25}{108}\cdot\dfrac{5751}{25}+\dfrac{187}{4}}{\dfrac{100}{21}:\dfrac{-41}{21}}=\dfrac{\dfrac{213}{4}+\dfrac{187}{4}}{\dfrac{-100}{41}}\)

\(=100\cdot\dfrac{-41}{100}=-41\)