Question

Giúp em câu b , c

 

Answer 1

b: \(=\dfrac{7}{4}+\dfrac{7}{4}:\dfrac{-1}{10}-\dfrac{1}{4}\cdot16\)

\(=\dfrac{7}{4}\left(1-10\right)-4=\dfrac{7}{4}\cdot\left(-9\right)-4=\dfrac{-63}{4}-\dfrac{16}{4}=-\dfrac{79}{4}\)

c: \(=\left(\dfrac{15}{20}-\dfrac{4}{20}-\dfrac{11}{20}\right)\cdot\left(\dfrac{2011}{2012}-\dfrac{2012}{2013}+\dfrac{2013}{2014}\right)=0\)