Ta có:\(\frac{31}{40}=\frac{31.6}{40.6}=\frac{186}{240}\)
Vì 240<241 nên \(\frac{186}{240}>\frac{186}{241}\)
Vậy \(\frac{31}{40}>\frac{186}{241}\)
Quy đồng ; So sánh hay Rút gọn vậy ?
Ta có: \(\frac{186}{241}< \frac{186}{240}\)
Mà \(\frac{186}{240}=\frac{31}{40}\Rightarrow\frac{186}{241}< \frac{186}{240}< \frac{31}{40}\)
Ta có : \(\frac{31}{40}=\frac{31\cdot6}{40\cdot6}=\frac{186}{240}\)
Vì \(240< 241\)nên \(\frac{186}{240}>\frac{186}{241}\)
Vậy \(\frac{31}{40}>\frac{186}{241}\)