a) \(\dfrac{4}{6}+\dfrac{7}{13}+\dfrac{17}{9}-\dfrac{8}{9}+\dfrac{14}{6}+\dfrac{19}{13}\)

\(=\dfrac{2}{3}+\dfrac{7}{13}+\dfrac{17}{9}-\dfrac{8}{9}+\dfrac{7}{3}+\dfrac{19}{13}\)

\(=\left(\dfrac{2}{3}+\dfrac{7}{3}\right)+\left(\dfrac{7}{13}+\dfrac{19}{13}\right)+\left(\dfrac{17}{9}-\dfrac{8}{9}\right)\)

\(=\dfrac{9}{3}+\dfrac{26}{13}+\dfrac{9}{9}\)

\(=3+2+1\)

\(=6\)

b) \(\dfrac{328}{435}\times\dfrac{468}{432}\times\dfrac{435}{164}\times\dfrac{432}{984}\times\dfrac{164}{468}\)

\(=\dfrac{328\times468\times435\times432\times164}{435\times432\times164\times984\times468}\)

\(=\dfrac{328}{984}\)

\(=\dfrac{1}{3}\)

\(\frac{328}{435}\cdot\frac{468}{432}\cdot\frac{435}{164}\cdot\frac{432}{984}\cdot\frac{164}{468}\) 

\(=\frac{328}{984}\) 

\(=\frac{1}{3}\)

12333dfffddđ

\(\frac{1}{3}\)

giải đầy đủ bạn ơi

\(\frac{328}{435}x\frac{435}{164}x\frac{468}{432}x\frac{432}{984}x\frac{164}{468}\)

\(=2x\frac{432}{164}x\frac{164}{468}\)

\(=2x\frac{432}{468}\)

\(=2x\frac{17}{13}\)

\(=\frac{34}{13}\)

328/435x468/432x435/164x432/984x164/468=34/13

khanhly4a1 cho mình nha

Kotomy tinh sai roi phai bang 1/3

bằng 0 nhé

`[28xx468xx435xx164]/[435xx432xx984xx468]`

`=[4xx7xx468xx435xx164]/[435xx108xx4xx164xx6xx468]`

`=7/[108xx6]=7/648`

\(\dfrac{\text{28 x 468 x435x 164 }}{435x432x984x468}=\dfrac{7}{108x6}=\dfrac{7}{648}\)

a/\(\left(\dfrac{7}{9}\times\dfrac{9}{7}\right)\times\dfrac{25}{28}\)
\(=1\times\dfrac{25}{28}\)
\(=\dfrac{25}{28}\)
b/\(\dfrac{4}{7}\times\dfrac{17}{18}\times\dfrac{7}{4}\times\dfrac{18}{17}\)
\(=\left(\dfrac{4}{7}\times\dfrac{7}{4}\right)\times\left(\dfrac{17}{18}\times\dfrac{18}{17}\right)\)
\(=1\times1\)
\(=1\)

trai hay gái cũng đc miễn là ARMY

Mik là ARMY nè.

Đáp án thì mik ko bt

Tk mik nha

Kb lại vs mik vì mik kb vs bn nhưng hình như bn ko đồng ý