bạn quy đồng hai phân số lên rồi so sánh 

bài dài mình ngại giải

what the not

a) 45/73 > 9/17                   

b) 18/11 > 6/5

d) 11/32 > 15/46

c) 31/26 < 15/46

e) 12345/12346 < 999/997      

a)=

b)>

c)=

Bạn ấn\(fx\)là ra phân số mà.

Mình giải như sau:

\(\frac{228}{225}>\frac{2228}{2225}\)

\(\frac{36}{39}>\frac{35}{41}\)

nhé bạn

\(\frac{228}{225}>\frac{2228}{2225}\)

\(\frac{36}{39}>\frac{35}{41}\)

Bạn giải thế nào ?

ta có : `3/5=(3xx11)/(5xx11)=33/55`

`33=33->3/5=33/55`

`3/5=3/5`

`33/55=(33:11)/(55:11)=3/5`

Vì `3=3` nên `3/5=3/5`

Vậy `3/5=33/55`

\(\dfrac{33}{55}=\dfrac{33:11}{55:11}=\dfrac{3}{5}=>\dfrac{3}{5}=\dfrac{33}{55}\)

a: 26/39>0>-24/32

b: -5/3<-1<-10/-11

11/15<33/39

\(\frac{11}{15}=\frac{11\times39}{15\times39}=\frac{429}{585}\)

\(\frac{33}{39}=\frac{33\times15}{39\times15}=\frac{495}{585}\)

Vậy.................

ta có: \(\frac{33}{39}=\frac{33:3}{39:3}=\frac{11}{13}\)vì \(\frac{11}{13}>\frac{11}{15}\)nên \(\frac{33}{39}>\frac{11}{15}\)

\(\dfrac{22}{33}=\dfrac{22:11}{33:11}=\dfrac{2}{3}\)
Ta có: 
Mẫu số chung 2 phân số: 57
\(\dfrac{12}{19}=\dfrac{12*3}{19*3}=\dfrac{36}{57}\)
\(\dfrac{2}{3}=\dfrac{2*19}{3*19}=\dfrac{38}{57}\)
Vì \(36< 38\) nên\(\dfrac{36}{57}< \dfrac{38}{57}\)
Vậy \(\dfrac{12}{19}< \dfrac{22}{33}\)

\(\dfrac{22}{33}\)=\(\dfrac{22:11}{33:11}\)=\(\dfrac{2}{3}\)=\(\dfrac{2\times6}{3\times6}\)=\(\dfrac{12}{18}\)>\(\dfrac{12}{19}\)

25/25 < 16/14

\(\dfrac{25}{25}< \dfrac{16}{14}\)