tính nhanh:
328/435 x 468/432 x 435/164 x 432/984 x164/468
ai làm dc thì mình tick
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\(\frac{328}{435}\cdot\frac{468}{432}\cdot\frac{435}{164}\cdot\frac{432}{984}\cdot\frac{164}{468}\)
\(=\frac{328}{984}\)
\(=\frac{1}{3}\)
\(\frac{328}{435}x\frac{435}{164}x\frac{468}{432}x\frac{432}{984}x\frac{164}{468}\)
\(=2x\frac{432}{164}x\frac{164}{468}\)
\(=2x\frac{432}{468}\)
\(=2x\frac{17}{13}\)
\(=\frac{34}{13}\)
328/435x468/432x435/164x432/984x164/468=34/13
khanhly4a1 cho mình nha
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) \(\dfrac{328}{435}\times\dfrac{468}{432}\times\dfrac{435}{164}\times\dfrac{432}{984}\times\dfrac{164}{468}\)
\(=\dfrac{328\times468\times435\times432\times164}{435\times432\times164\times984\times468}\)
\(=\dfrac{328}{984}\)
\(=\dfrac{1}{3}\)
`[28xx468xx435xx164]/[435xx432xx984xx468]`
`=[4xx7xx468xx435xx164]/[435xx108xx4xx164xx6xx468]`
`=7/[108xx6]=7/648`
\(\dfrac{\text{28 x 468 x435x 164 }}{435x432x984x468}=\dfrac{7}{108x6}=\dfrac{7}{648}\)
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
435 x 567 = 246645
2456 x 4 = 9824
6564 x 66 = 433224
~ Chúc bạn hok tốt ~
a) \(\text{2459 - (400 + 459)}\)
\(\text{= 2459 - 859}\)
\(\text{= 1600}\)
b) \(435\times25+76\times435-435\)
\(=435\times\left(25+76-1\right)\)
\(=435\times100\)
\(=43500\)
c) \(35\times49+51\times36\)
\(=35\times49+51\times\left(35+1\right)\)
\(=35\times49+51\times35+51\)
\(=35\times\left(49+51\right)+51\)
\(=35\times100+51\)
\(=3500+51\)
\(=3551\)
a) 2459 - (400 + 459)
= 2459 - 400 - 459
= (2459 - 459) - 400
= 2400 - 400
= 2000
b) 435 x 25 + 76 x 435 - 435
= 435 x (25 + 76 - 1)
= 435 x 100
= 43500
c) 35 x 49 + 51 x 36
= 1715 + 1836
= 3551
\(\frac{1}{3}\)
giải đầy đủ bạn ơi