lớp 4 học cái này mà 

bài cô giao mà thật đó ko thì bắt giải chi tiết lm j

Ta có :

\(\frac{204204}{217217}=\frac{204204:1001}{217217:1001}=\frac{204}{217}\)

\(\frac{414141}{494949}=\frac{414141:10101}{494949:10101}=\frac{41}{49}\)

\(\frac{171171171}{180180180}=\frac{171171171:9009009}{180180180:9009009}=\frac{19}{20}\)

=204/217    41/49   95/100 nha bạn

\(\frac{3131}{3535}=\frac{3131:101}{3535:101}=\frac{31}{35}\)

\(\frac{204204}{217217}=\frac{204204:1001}{217217:1001}=\frac{204}{217}\)

\(\frac{414141}{180180}=\frac{414141:273}{180180:273}=\frac{1517}{660}\)

\(\frac{171171171}{180180180}=\frac{171171171:9009009}{180180180:9009009}=\frac{19}{20}\)

cảm ơn bn

nhưng thiếu đề

đề đâu

a, 204204    204204:1001      204

   ______=   ___________ =  ___

   217217      217217:1001     217

b, 414141     414141:10101     41

    ______=   ___________ =  ___

    494949     494949:10101     49

c, 171171171     171171171:9009009      19

    _________=   ________________=    ___

   180180180      180180180:9009009     20

 chuc ban hok tot

thank bn nha

\(\dfrac{3131}{3535}=\dfrac{31}{35}\)

\(\dfrac{204204}{217217}=\dfrac{204}{217}\)

\(\dfrac{414414}{494949}=\dfrac{1518}{1813}\)

\(\dfrac{171171171}{180180180}=\dfrac{19}{20}\)

\(\dfrac{3131}{3535}=\dfrac{31}{35}\)

\(\dfrac{204204}{217217}=\dfrac{204}{217}\)

\(\dfrac{414414}{494949}=\dfrac{1518}{1813}\)

\(\dfrac{171171171}{180180180}=\dfrac{19}{20}\)

ủa cái mạ j zậy 

là sao

\(\frac{232323}{494949}=\frac{232323:10101}{494949:10101}=\frac{23}{49}\)

\(\frac{204204}{217217}=\frac{204204:1001}{217217:1001}=\frac{204}{217}\)

\(\frac{171171171}{180180180}=\frac{171171171:9009009}{180180180:9009009}=\frac{19}{20}\)

\(\frac{232323}{494949}=\frac{232323:10101}{494949:10101}=\frac{23}{49}\)

\(\frac{204204}{217217}=\frac{204204:1001}{217217:1001}=\frac{204}{217}\)

\(\frac{171171171}{180180180}=\frac{171171171::9009009}{180180180:9009009}=\frac{19}{20}\)