\(\left(\dfrac{2016}{2017}-\dfrac{3}{2015}\right)\div\left(\dfrac{-2}{3}\right)-\left(\dfrac{2012}{2015}-\dfrac{1}{2017}\right)\div\left(\dfrac{-2}{3}\right)\)
\(=\left[\left(\dfrac{2016}{2017}-\dfrac{3}{2015}\right)-\left(\dfrac{2012}{2015}-\dfrac{1}{2017}\right)\right]\div\left(\dfrac{-2}{3}\right)\)
\(=\left(\dfrac{2016}{2017}-\dfrac{3}{2015}-\dfrac{2012}{2015}+\dfrac{1}{2017}\right)\div\left(\dfrac{-2}{3}\right)\)
\(=\left[\left(\dfrac{2016}{2017}+\dfrac{1}{2017}\right)+\left(-\dfrac{3}{2015}-\dfrac{2012}{2015}\right)\right]\div\left(\dfrac{-2}{3}\right)\)
\(=\left[1+\left(-1\right)\right]\div\left(\dfrac{-2}{3}\right)\)
\(=0\div\left(\dfrac{-2}{3}\right)=0\)
mình có gì sai sót xin bạn thông cảm cho
