ta lấy : 2727-1818=909

2727:909=3

1818:909=2

vậy bằng 3/2

a) 2727=27x101

   1818=18x101

nên 2727 / 1818 = 27 x 101 / 18 x 101 = 27 / 18 = 3/2 ( chia cả tử và mẫu cho 9)

b) tương tự có : 123 x 1001 / 345 x 1001 = 123 / 345 = 41 / 115 ( chia cả tử và mẫu cho 3)

2727/1818 = 303/202

Rút gọn:

\(A=\frac{2483-13}{4966-26}=\frac{13.\left(191-1\right)}{26.\left(191-1\right)}\)

   \(=\frac{13.190}{26.190}=\frac{13}{26}=\frac{1}{2}\)

\(B=\frac{2727-101}{7575+303}=\frac{101.\left(27+1\right)}{303.\left(25+1\right)}\)

   \(=\frac{101.26}{303.26}=\frac{101}{303}=\frac{1}{3}\)

Quy đồng:

\(\frac{1}{2}\)và    \(\frac{1}{3}\)

\(\frac{1}{2}=\frac{1.3}{2.3}=\frac{3}{6}\)                       \(\frac{1}{3}=\frac{1.2}{3.2}=\frac{2}{6}\)

\(\dfrac{1515}{2727}=\dfrac{1515:303}{2727:303}=\dfrac{5}{9}\)

Chia tử vào mẫu cho 101 ta có ps tối giản là: 

15/17

\(\dfrac{1515}{2727}=\dfrac{1515:303}{2727:303}=\dfrac{5}{9}\)

a)\(\frac{2525}{2727}\)không rút gọn được.                 b)\(\frac{7}{20}\) = \(\frac{42}{120}\);\(\frac{23}{30}\) = \(\frac{92}{120}\);\(\frac{34}{40}\) = \(\frac{102}{120}\);\(\frac{53}{60}\) = \(\frac{106}{120}\)

 \(\frac{135135}{500500}\)= \(\frac{57027}{100100}\)

\(\frac{135153153}{170170170}\)=\(\frac{45051051}{56723390}\)

a) 2525/2727 =2525:101/2727:101 =25/27 

135135/500500 =135135:5005/500500:5005 =27/100 

135153153/170170170=135153153:17017017/170170170:17017017=9/10

b) 7/20 =7x6/20x6 =42/120 

  23/30 =23x4/30x4 =92/120 

   34/40 =34x3/40x3 =102/120 

2525/2727 = 25/27                                !              7/20 = 63/120

135135/500500 = 27/100                      !              23/30 = 92/120

153153153/170170170=  153/170        !              34/40 = 102/120

cậu sai số  135153153 rồi                     !              53/60 = 106/120

phải thế này mới đúng 153153153       !             XONG !!!!!!

a) \(\frac{2525}{2727}=\frac{2525:101}{2727:101}=\frac{25}{27}\)

\(\frac{135135}{500500}=\frac{135135:5005}{500500:5005}=\frac{27}{100}\)

\(\frac{153153153}{170170170}=\frac{153153153:17017017}{170170170:17017017}=\frac{9}{10}\)

b) \(\frac{7}{20}=\frac{7x6}{20x6}=\frac{42}{120}\)

  \(\frac{23}{30}=\frac{23x4}{30x4}=\frac{92}{120}\)

   \(\frac{34}{40}=\frac{34x3}{40x3}=\frac{102}{120}\)

    \(\frac{53}{60}=\frac{53x2}{60x2}=\frac{106}{120}\)

1717/1818=17/18

230230/240240=23/24

có 17/18=51/72

     23/24=69/72

có 69/72>51/72

=>230230/240240>1717/1818

a.=19/27

b,15/16;;;;kick nha bạn

\(\frac{1919}{2727}=\frac{19}{27}\)

\(\frac{4590}{4896}=\frac{15}{16}\)

k mik nha

Rút gọn phân số  :

\(\frac{1919}{2727}\)    \(\frac{4590}{4896}\)

\(\frac{1919}{2727}\)=   \(\frac{1919:101}{2727:101}\)=    \(\frac{19}{27}\)

\(\frac{4590}{4896}\)=   \(\frac{4590:2}{4896:2}\)=  \(\frac{2295}{2448}\)=  \(\frac{2295:9}{2448:9}\)=   \(\frac{255}{272}\)

Hơi khó à nha

Ta có :

\(\frac{2727}{4242}=\frac{2727:303}{4242:303}=\frac{9}{14}\)

Vậy rút gọ được : 9/14

k mik nha bn

thank you very much

\(\frac{2727}{4242}\) =   \(\frac{2727:303}{4242:303}\) =   \(\frac{9}{14}\)

\(\frac{9}{14}\)