Question

So sánh các phấn số:

2016/2019 và 2017/2020

 

Answer 1

\(\dfrac{2016}{2019}< \dfrac{2016+1}{2019+1}=\dfrac{2017}{2020}\)

\(\Rightarrow\dfrac{2016}{2019}< \dfrac{2017}{2020}\)

Answer 2

Ta có:

\(\dfrac{2016}{2019}=1-\dfrac{3}{2019};\dfrac{2017}{2020}=1-\dfrac{3}{2020}\)

Do \(2019< 2020\Rightarrow\dfrac{3}{2019}>\dfrac{3}{2020}\)

\(\Rightarrow1-\dfrac{3}{2019}< 1-\dfrac{3}{2020}\)

Do đó:\(\dfrac{2016}{2019}< \dfrac{2017}{2020}\)