$\frac{5}{9}$ > $\frac{4}{9}$
( Vì: chung mẫu số, 5>4 )
$\frac{9}{13}$ < $\frac{13}{13}$
( Vì: $\frac{9}{13}$ < 1 ; $\frac{13}{13}$ = 1 )
$\frac{6}{8}$ < $\frac{7}{8}$
( Vì: chung mẫu số, 6<7 )
$\frac{9}{12}$ < $\frac{16}{12}$
( Vì: $\frac{9}{12}$ < 1 ; $\frac{16}{12}$ > 1 )
- hoangvan2008 -