Question

\(\frac{2017x2018+1}{2019+2016x2018}\)Tính nhanh

Answer 1

Ta có :

\(\frac{2017\times2018+1}{2019+2016\times2018}\)

\(=\frac{2017\times2018+1}{1+2018+2016\times2018}\)

\(=\frac{2017\times2018+1}{1+2018\times\left(2016+1\right)}\)

\(=\frac{2017\times2018+1}{1+2018\times2017}\)

\(=1\)

Answer 2

\(\frac{2017.2018+1}{2019+2016.2018}\)

\(=\frac{2017.2018+1}{1+2018+2016.2018}\)

\(=\frac{2017.(2018+1)}{(1+2018).\left(2016+1\right)}\)

\(=\frac{2017.2019}{2019.2017}\)

\(=\frac{1}{1}=1\)