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Ta có : \(\frac{1919}{2323}x\frac{464646}{747474}x\frac{37}{19}\)
\(=\frac{19}{23}x\frac{23}{37}x\frac{37}{19}\)
\(=\frac{19x23x37}{23x37x19}\)
\(=1\)
~ Chúc các bn học giỏi và may mắn ~
\(\frac{1919}{2323}.\frac{464646}{747474}.\frac{37}{19}\)
\(=\frac{1919:101}{2323:101}.\frac{464646:10101}{747474:10101}.\frac{37}{19}\)
\(=\frac{19}{23}.\frac{46}{74}.\frac{37}{19}\)
\(=\frac{19.46.37}{23.74.19}=\frac{19.23.2.37}{23.37.2.19}=1\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(A=\frac{17}{19}x\frac{1}{6}+\frac{17}{19}x\frac{5}{6}\)
\(=\frac{17}{19}x\left(\frac{1}{6}+\frac{5}{6}\right)=\frac{17}{19}x1=\frac{17}{19}\)
A= \(\frac{1717}{1919}\text{ *}\frac{303}{1818}+\frac{17}{19}\text{ *}\frac{1515}{1818}\)
A= \(\frac{17}{19}\text{ *}\frac{3}{18}+\frac{17}{19}\text{ *}\frac{15}{18}\)
A= \(\frac{17}{19}\text{ *}\left(\frac{3}{18}+\frac{15}{18}\right)\)
A= \(\frac{17}{19}\text{ *}1\)
A= \(\frac{17}{19}\)
Vậy A= \(\frac{17}{19}\)
vVv Học tốt nhé bạn, mình sẽ rất vui nếu bạn k đúng cho mình, cảm ơn ban nhiều vVv
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\dfrac{1919}{2323}\times\dfrac{464646}{747474}\times\dfrac{37}{19}\)
\(=\)\(\dfrac{1919:101}{2323:101}\times\dfrac{464646:10101}{747474:10101}\times\dfrac{37}{19}\)
\(=\dfrac{19}{23}\times\dfrac{46}{74}\times\dfrac{37}{19}\)
\(=\dfrac{19\times23\times2\times37}{23\times2\times37\times19}=1\)
![](https://rs.olm.vn/images/avt/0.png?1311)
ta có:
= 19/23 x 23/37 x 37/19
= 19 x 23 x 37 / 23 x 37 x 19
= 1
chúc bạn học tốt có bài khó hỏi mình
![](https://rs.olm.vn/images/avt/0.png?1311)
câu 1
5m vuông 8dm vuông = 508 dm vuông
câu 3
1919:2323*464646:747474*37:19
(1919:19)*46*10101:74*10101*37:23*101
=(101*101)*(46*74)*(10101:10101)*37 :23
=10201*3404*1*37 :23
=10201*(3404:23)
10201*148
=1509748
=1919:101/2323x464646:10101/747474:10101x37/19=19/23x46/74x37/19=2/2=1
= 1x1x1
=1