Bạn tham khảo :

Bài 1 :

$a,$

Ta có :

$\dfrac{11}{32} = \dfrac{11.3}{32.3}  = \dfrac{33}{96}$

$\dfrac{1}{3} = \dfrac{1.32}{3.32}  = \dfrac{32}{96}$ 

Vì $33 > 32 ⇒ \dfrac{33}{96} > \dfrac{32}{96}$

⇔ $\dfrac{11}{32} >  \dfrac{1}{3}$

$b,$ :

Ta có :

$\dfrac{-10}{3} = \dfrac{-10.4}{3.4}  = \dfrac{-40}{12}$

$-4 =\dfrac{-48}{12} $ 

Vì $-40 > -48 ⇒ \dfrac{-40}{12} > \dfrac{-48}{12}$

⇔ $\dfrac{-10}{3} >  -4$

$c,$ 

Ta có :

$\dfrac{-23}{15} = \dfrac{-23.9}{15.9}  = \dfrac{-207}{135}$

$\dfrac{-14}{9} =\dfrac{-14.15}{9.15}  = \dfrac{-210}{135 }  $    

Vì  $-207 > -210 ⇒ \dfrac{-207}{135}> \dfrac{-210}{135 }  $ 

⇔ $\dfrac{-23}{15} >  \dfrac{-14}{9} $   

$d,$   

$\dfrac{7}{10} = \dfrac{7.14}{10.14}  = \dfrac{98}{140}$

$\dfrac{11}{14} =\dfrac{11.10}{14.10}  = \dfrac{110}{140 }  $    

Vì  $110> 98⇒ \dfrac{110}{140 } > \dfrac{98}{140}  $ 

⇔ $\dfrac{11}{14} >\dfrac{7}{10} $    

a

ta có 11/32=33/96

         1/3=32/96

vì 33/96>32/96

=>11/32>1/3

b

ta có -4=-12/3

vì -10/3>-12/3

=>-10/3>-4

c 

ta có -23/15<0

         14/9>0

=>-23/15<14/9

d

ta có 7/10=98/140

         11/14=110/140

vì 110/140>98/140

=>7/10<11/14