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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)
![](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)
P/s : Đúng nha
\(\frac{15}{17}\times\frac{51}{5}< x< \frac{67}{9}+\frac{35}{9}\)
\(\Rightarrow9< x< \frac{102}{9}\)
\(\Rightarrow9< x< 12\)
\(\Rightarrow x=10\)hoặc \(x=11\)
Vậy \(x=10\)hoặc \(x=11\)
![](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)
\(\frac{1919}{2323}.\frac{4646}{7474}.\frac{37}{19}\)
\(=\frac{19}{23}.\frac{23}{37}.\frac{37}{19}\)
\(=\frac{19.23.37}{23.37.19}\)
\(=1\)
_Chúc bạn học tốt_
ta có:
\(\frac{1919}{2323}=\frac{19}{23}\)
\(\frac{4646}{7474}=\frac{46}{74}\)
=> \(\frac{1919}{2323}\cdot\frac{4646}{7474}.\frac{37}{19}=\frac{19}{23}\cdot\frac{46}{74}\cdot\frac{37}{19}\)= \(\frac{19}{23}\cdot\frac{2\cdot23}{37\cdot2}\cdot\frac{37}{19}\)= 1
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{1919}{2323}.\frac{464646}{747474}.\frac{37}{19}\)
\(=\frac{19}{23}.\frac{46}{74}.\frac{37}{19}\)
\(=\frac{19.46.37}{23.74.19}\)
Sao khi giản ước, ta có:
\(=\frac{1702}{1702}=1\)
Nhớ ấn đúng cho mình nhé!
207/323
\(x\times\frac{17}{9}=\frac{2323}{1919}\)
\(x\times\frac{17}{9}=\frac{23}{19}\)
\(x=\frac{23}{19}:\frac{17}{9}\)
\(x=\frac{207}{323}\)