a, 120/300= 2/5

b, 360/640=9/16

c, 2310/3850=321/385

d,1313/4747=13/47

a) \(\frac{120}{300}=\frac{12}{30}=\frac{2}{5}\)

b) \(\frac{360}{640}=\frac{36}{64}=\frac{6}{9}\)

c) \(\frac{2310}{3850}=\frac{231}{385}=\frac{3}{5}\)

d) \(\frac{1313}{4747}=\frac{13}{47}\)

a)\(\frac{120}{300}=\frac{120:60}{300:60}=\frac{2}{5}\)

b)\(\frac{360}{640}=\frac{360:40}{640:40}=\frac{9}{16}\)

c)\(\frac{2310}{3850}=\frac{2310:210}{3850:210}=\frac{11}{18}\)

d)\(\frac{1313}{4747}=\frac{13.101}{47.101}=\frac{13}{47}\)

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

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

a ) 5 6 b ) − 3 8 c ) 1 4

d ) 1 2 e ) − 1 2 f ) − 16 13

\(\frac{1313}{1717}=\frac{1313:101}{1717:101}=\frac{13}{17}\)

\(\frac{131313}{171717}=\frac{131313:10101}{171717:10101}=\frac{13}{17}\)

1313/2323= 1313:101/2323:102= 13/23

515151/636363= 515151:30303/ 636363:30303= 17/21

a/\(\frac{1313}{2323}=\frac{13}{23}\)    b/\(\frac{515151}{636363}=\frac{51}{63}\)  

xog ùi bn tk mk vs, mk đúng thì tk nha thanks ^2

\(\frac{1313}{2323}=\frac{1313:101}{2323:101}=\frac{13}{23}\) ,  \(\frac{515151}{636363}=\frac{515151:10101}{636363:10101}=\frac{51}{63}=\frac{17}{21}\)

làm như bn my là đúng nhé, mk tự làm và ko sao chép 

\(a.\dfrac{13}{15}\)

b.\(\dfrac{25}{52}\)

a ) \(\dfrac{1313}{1515}\text{=}\dfrac{13}{15}\)

b) hình như em ghi sai đề thì phải kết quả vẫn như vậy không rút gọn đc nx

Nguyễn Thành Đạt do đề cô giao ghi vậy đó

12/13

\(\dfrac{1212}{1313}=\dfrac{1212:101}{1313:101}=\dfrac{12}{13}\)

= \(\dfrac{12}{13}\)

Grieuruufuru rồi ư là một trong ytgyuryuty tuy yyyeyrheygteteyyeh