\(\frac{45}{27}\) > \(\frac{494949}{353535}\)
Vì rút gọn 2 p/s này ta đc : \(\frac{5}{3}\)và \(\frac{7}{5}\)
So sánh : \(\frac{5}{3}\)> \(\frac{7}{5}\)( quy đồng mẫu số )
Nên ...............................
\(\text{So sánh :}\)
\(\frac{45}{27}\text{ và }\frac{494949}{353535}\)
\(\text{Ta có :}\)
\(\frac{45}{27}=\frac{45\text{ : }9}{27\text{ : }9}=\frac{5}{3}\)
\(\frac{494949}{353535}=\frac{494949\text{ : }10101}{353535\text{ : }10101}=\frac{49}{35}=\frac{7}{5}\)
\(\Rightarrow\frac{5}{3}=\frac{5\cdot5}{3\cdot5}=\frac{25}{15}\)
\(\Rightarrow\frac{7}{5}=\frac{7\cdot3}{5\cdot3}=\frac{21}{15}\)
\(\text{Vì : }\frac{25}{15}>\frac{21}{15}\text{ nên }\frac{45}{27}>\frac{494949}{353535}\)
45/27= 5/3
494949/353535= (49x 10101)/(35x10101)=49/35=7/5
5/3= 25/15
7/5= 21/15
mà 25/15>21/15 nên suya ra 45/27>494949/353535