Question

Không quy đồng, hãy so sánh 2 phân số: 2005/2001 và 2048/2028 

Answer 1

\(\dfrac{2005}{2001}< 1;\dfrac{2048}{2028}>1\Rightarrow\dfrac{2005}{2001}< \dfrac{2048}{2028}\)

Answer 2

\(\dfrac{2005}{2001}\) = 1 + \(\dfrac{4}{2001}\) = 1 + \(\dfrac{20}{10005}\)

\(\dfrac{2048}{2028}\) =  1+ \(\dfrac{20}{2028}\) 

Vì \(\dfrac{20}{10005}\) <  \(\dfrac{20}{2028}\) nên  \(\dfrac{2005}{2001}\) < \(\dfrac{2020}{2028}\)