a:\(\dfrac{12}{13}\)

b:\(\dfrac{12}{13}\)

c:\(\dfrac{121}{131}\)

Câu a: \(\dfrac{12}{13}\)

Câu b: \(\dfrac{12}{13}\)

Câu c: \(\dfrac{121}{121}\)

a )   − 1212 − 2424 = ( − 1212 ) : ( − 1212 ) ( − 2424 ) : ( − 1212 ) = 1 2

b )   120120 − 240240 = 120120 : ( − 120120 ) − 240240 : ( − 120120 ) = − 1 2

c)  1313 − 1414 = 1313 : ( − 101 ) − 1414 : ( − 101 ) = − 13 14

ai giúp mik với mai phải nộp rồi

\(\dfrac{12}{13}\)= \(\dfrac{12.101}{13.101}\)= \(\dfrac{1212}{1313}\) (1)

\(\dfrac{12}{13}\) = \(\dfrac{12.\left(-10101\right)}{13.\left(-10101\right)}\) = \(\dfrac{-121212}{-131313}\)(2)

Từ (1) và (2) => \(\dfrac{12}{13}=\dfrac{1212}{1313}=\dfrac{-121212}{-131313}\)

85/153= 5/9

1111/1212= 11/12

1530/1632= 15/16

85/153= 5/9

1111/1212= 11/12

1530/1632= 15/16

5/9      
11/12

a) \(\frac{6}{9}=\frac{6:3}{9:3}=\frac{2}{3}\)

b)\(\frac{10}{48}=\frac{10:2}{48:2}=\frac{5}{24}\)

c)\(\frac{72}{84}=\frac{72:12}{84:12}=\frac{6}{7}\)

d)\(\frac{1212}{3939}=\frac{1212:303}{3939:303}=\frac{4}{13}\)

#H

Rút gọn phân số:

\(\frac{6}{9}=\frac{6\div3}{9\div3}=\frac{2}{3}\)

\(\frac{10}{48}=\frac{10\div2}{48\div2}=\frac{5}{24}\)

\(\frac{72}{84}=\frac{72\div12}{84\div12}=\frac{6}{7}\)

\(\frac{1212}{3939}=\frac{1212\div303}{3939\div303}=\frac{4}{13}\)

121/143=11/13

1212/1414=6/7

123123/456456=123/456=41/152

\(\dfrac{121}{143}=\dfrac{11}{13}\) ;  \(\dfrac{1212}{1414}=\dfrac{6}{7}\) ;  \(\dfrac{123}{456}=\dfrac{41}{152}\)

121/143 = 11/13

1 212 / 1414 = 6/7

123 123/456 456 = 123/456 = 41/152

\(\dfrac{60}{75}\)=\(\dfrac{4}{5}\)

\(\dfrac{48}{72}\)=\(\dfrac{2}{3}\)

\(\dfrac{65}{9}\)=\(\dfrac{65}{9}\)

\(\dfrac{121212}{121212}\)=1

a) 33 66 = 33 : 33 66 : 33 = 1 2 b ) − 22 77 = − 22 : 11 77 : 11 = − 2 7

c ) 3030 6060 = 3030 : 3030 6060 : 3030 = − 1 2 d ) − 1212 − 2424 = ( − 1212 ) : ( − 1212 ) ( − 2424 ) : ( − 1212 ) = 1 2

e ) 120120 − 240240 = 120120 : ( − 120120 ) − 240240 : ( − 120120 ) = − 1 2

f ) 1313 − 1414 = 1313 : ( − 101 ) − 1414 : ( − 101 ) = − 13 14

121212/484848=

=12/48

1/4

1/4 đó bạn nhớ k nha

Ta có : \(\frac{121212}{484848}=\frac{121212:121212}{484848:121212}=\frac{1}{4}\)

Đáp số : \(\frac{1}{4}\)