Question

So sánh 2 phân số \(\frac{72}{73}\) và \(\frac{98}{99}\)

 

Answer 1

Ta co  : 72/73 = 1 - 1/73 ; 98/99 = 1 - 1/99

Vì 1/73 > 1/99 suy ra 1 - 1/73 < 1 - 1/99 hay 72/73 < 98/99

Answer 2

Ta có: \(\frac{72}{73}=1-\frac{1}{73}\);\(\frac{98}{99}=1-\frac{1}{99}\)

Vì \(\frac{1}{73}>\frac{1}{99}\Rightarrow1-\frac{1}{73}< 1-\frac{1}{99}\)

                          \(\Rightarrow\frac{72}{73}< \frac{98}{99}\)

Vậy \(\frac{72}{73}< \frac{98}{99}\)