26 x 182 + 182 x 47 + 91 x 27 x 2

=26 x 182 + 182 x 47 +(91x2)x27

=26 x 182 + 182 x 47 + 182x27

= 182x(26+47+27)

=    182x100

=18200

26 x 182 + 182 x 47 + 91 x 27 x 2

= 26 x 182 + 182 x 47 +  ( 91 x 2) x 27

= 26 x 182 + 182 x 47 + 182 x 27

= 182 x ( 26 + 47 + 27 )

= 182 x 100

= 18200

=18200

a)-(2x + 15 ) + 13 = -234

\(\Leftrightarrow\)-2x-15+13+234=0

\(\Leftrightarrow\)2x=232

\(\Leftrightarrow\)x=116

b)2+4+6+8 +..............+2x=182

\(\Leftrightarrow\)2(1+2+3+4+.....+x) =182

\(\Leftrightarrow\)1+2+3+4+.....+x= 182/2 = 91

\(\Leftrightarrow\)x(x+1)/2 =91

\(\Leftrightarrow\)x(x+1)= 182

\(\Leftrightarrow\)x(x+1) = 13(13+1)

\(\Leftrightarrow\)\(\hept{\begin{cases}x=13\\x+1=13+1\end{cases}}\Leftrightarrow x=13\)

Vậy...

a/ \(x-\dfrac{3}{7}=\dfrac{2}{5}\cdot\dfrac{1}{4}\)

\(x-\dfrac{3}{7}=\dfrac{1}{10}\)

\(x=\dfrac{1}{10}+\dfrac{3}{7}=\dfrac{37}{70}\)

Vậy....

b/ \(x+\dfrac{4}{5}=-\dfrac{5}{12}\cdot\dfrac{3}{25}\)

\(x+\dfrac{4}{5}=-\dfrac{1}{20}\)

\(x=-\dfrac{1}{20}-\dfrac{4}{5}=-\dfrac{17}{20}\)

Vậy....

c/ \(\dfrac{x}{182}=-\dfrac{6}{12}\cdot\dfrac{35}{91}\)

\(\dfrac{x}{182}=-\dfrac{5}{26}\)

\(=>x\cdot26=-5\cdot182\)

\(26x=-910\)

\(x=-910:26=-35\)

Vậy....

a) Ta có: \(x-\dfrac{3}{7}=\dfrac{2}{5}\cdot\dfrac{1}{4}\)

\(\Leftrightarrow x-\dfrac{3}{7}=\dfrac{1}{10}\)

\(\Leftrightarrow x=\dfrac{1}{10}+\dfrac{3}{7}=\dfrac{7}{70}+\dfrac{30}{70}\)

hay \(x=\dfrac{37}{70}\)

Vậy: \(x=\dfrac{37}{70}\)

570-225-167+67=345-167+67

                        =178+67=245

168x2:6x4=336:6x4=56x4=224

b)468:6+61x2=78+61x2=78+122=200

5625-5000:(726:6-113)=5625-5000:8=5625-625=5000

tick cho minh nha

A.245                       B.200

 224                         5000

a) 570 - 225 - 167 + 67 = 345 - 167 + 67 = 178 + 67 = 245

    168 x 2 : 6 x 4 = 336 :  6 x 4 = 56 x 4 = 224

b) 468 : 6 + 61 x 2 = 78 + 122 = 200

   5625 - 5000 : (726 : 6 - 113) = 5000 - 5000 : (121 - 21) = 5000 - 5000 : 100 = 5000 - 50 = 4950

\(A=468+15\times468+85\times468\\ =468\times\left(1+15+85\right)\\ =468\times101\\ =47268\)

Em xem lại đề câu này không thể tính nhanh được.

\(A=468+15x468+85x468\\ A=468x\left(15+85+1\right)\\ A=468x101\\ A=47268\)

Cái đó mà không biết nữa thì xứng đáng được 0 điểm.

Trả lời

a)964.3+496.4-496.6

=964.3+[496.(4-6)]

=964.3+(-992)

=2892+(-992)

=1900

b)2019.(2020+1)-2019.2020

=2019.2020.2019-2019.2020

=2019

c)436+324.(234-1)-234.324+324

=436+324.234-324-234.324+324

=436

d)472.(36-1)+35.8

=472.35+35.8

=35.(472+8)

=35.480

=16 800

Ko chắc nha, sai thì cho mk xl vì làm phiền bạn !

b)2019.(2020+1)-2019.2020

=2019.(2020+1-2020)

=2019.1

=2019

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

\(=\frac{328}{984}\) 

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

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