\(\frac{252525}{373737}=\frac{252525:10101}{373737:10101}=\frac{25}{37}\)

\(\frac{272727}{353535}=\frac{272727:10101}{353535:10101}=\frac{27}{35}>\frac{27}{37}>\frac{25}{37}\)

vậy \(\frac{252525}{373737}

\(\frac{252525}{373737}=\frac{25.10101}{37.10101}=\frac{25}{37}=\frac{875}{1295}\)

\(\frac{272727}{353535}=\frac{27.10101}{35.10101}=\frac{27}{35}=\frac{999}{1295}\)

Vì \(\frac{875}{1295}

\(\frac{252525}{373737}=\frac{252525:10101}{373737:10101}=\frac{25}{37};\frac{272727}{353535}=\frac{272727:10101}{353535:10101}=\frac{27}{35}\)

=>25/37<27/35

\(\frac{2525}{5353}=\frac{2525:101}{5353:101}=\frac{25}{53}\)

\(\frac{252525}{535353}=\frac{252525:10101}{535353:10101}=\frac{25}{53}\)

Vậy\(\frac{25}{53}=\frac{2525}{5353}=\frac{252525}{535353}\)

Có : 2525/5353 = 25 x 101 / 53 x 101 = 25/53

252525/535353 = 25 x 10101 / 53 x 10101 = 25/53

=> 25/53 = 2525/5353 = 252525/535353

Tk mk nha

ba phân số:\(\frac{25}{35}\)=\(\frac{2525}{3535}\)=\(\frac{252525}{353535}\)

Vì \(\frac{2525}{3535}\)rút gọn bằng \(\frac{25}{35}\)                                     \(\frac{252525}{353535}\)rút gọn bằng \(\frac{25}{35}\)

NÊN 3 PHÂN SỐ TRÊN BẰNG NHAU

\(\text{Ta có: }\frac{-181818}{313131}=\frac{-18.10101}{31.10101}=\frac{-18}{31}\)

\(\text{Vậy }\frac{-18}{31}=\frac{-181818}{313131}\)

\(\text{Ta có:}\frac{-137}{59}-1\)

\(\text{Vậy }\frac{-137}{59}

Ta có \(\frac{25}{53}\)=\(\frac{25.101}{53.101}\)=\(\frac{2525}{5353}\)

\(\frac{25}{53}\)=\(\frac{25.10101}{53.10101}\)=\(\frac{252525}{535353}\)

A)15x2154/1505

=6462/301

B)=103/1031

C)=327/328+400/-12

=727/316

D)=4/5

Bai 2=4 ta thay mau so la 4 nen 43-4=39 va 56-4=52 ta se thay 39/52=3/4.

Giải chi tiết ra chứ

viết mỗi đáp án thôi à giải hẳn ra chứ

\(\frac{45}{27}\)  >    \(\frac{494949}{353535}\)

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

Bạn nào cho mk 1 ik, mk cho bn ý 3 ik luôn. Mk hứa nếu nói dối bạn có thể Báo cáo sai phạm mk.

45/27.............................49/35

quy đồng là ra ( hoặc tìm phân số trung gian)

k nhé

a) \(15\times\left(\frac{212121}{434343}+\frac{333333}{353535}\right)=15\times\left(\frac{21\times10101}{43\times10101}+\frac{33\times10101}{35\times10101}\right)\)

\(=15\times\left(\frac{21}{43}+\frac{33}{35}\right)=\frac{6462}{301}\)

b) \(\frac{639\times721721}{721\times639639}=\frac{639\times721\times1001}{721\times639\times1001}=1\)

c) \(\frac{327\times412+400}{328\times412-12}=\frac{\left(328-1\right)\times412+400}{328\times412-12}=\frac{328\times412-412+400}{328\times412-12}\)

\(=\frac{328\times412-12}{328\times412-12}=1\)

d) \(9\times\left(\frac{151515}{171717}+\frac{131313}{181818}\right)=9\times\left(\frac{15\times10101}{17\times10101}+\frac{13\times10101}{18\times10101}\right)=9\times\left(\frac{15}{17}+\frac{13}{18}\right)\)

\(=9\times\frac{491}{306}=\frac{491}{34}\)

thank bn