\(a,468:6+51\times2\\ =78+102\\ =180\\ b,\left(15\times24\right):4\\ =360:4\\ =90\)

\(a,468:6+51\times2=78+102=180\)

\(b,\left(15\times24\right):4=360:4=90\)

a. 468 : 6 + 51 x 2

= 78 + 102

=180

b. (15x24):4

=360:4

=90

(2+4+6+...+2020) x (182 x 234 -91 x 468)

= (2+4+6+...+2020) x (91x2x234 -91 x 234x2)

= (2+4+6+...+2020) x 0

=0

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

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

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

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

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=468x4x3

a=5616

a:6=5616:6=936

a=468x4x3

a=5616

a:6=5616:6

a:6=936

a:3:4=468

a:(3x4)=468

a:12=468

a    =468x12

a    =5616

vậy 5616:6=936

A : 4 : 3 = 468

          A = 468 x 3 x 4

          A = 5616

Vậy: A : 6 = 5616 : 6 = 936

Đúng 100%

Đúng 100%

Đúng 100%

a : 4 : 3 = 468                                a : 6 = ? \(\Rightarrow\)5616 : 6 =

a           = 468 * 4 * 3                                                       = 5616 : 6

a           = 1872 * 3                                                           = 936

a           = 5616           

vậy a = 5616

468 : 6 = 61 x 2

<=> 78 = 122 (sai)

468 : 6 = 61 x 2

468 : 6 = 122

468 : 6 = 122 (sai)

Sửa lại: 468 : 6 = 78

468 : 6 + 61 x 2 

= 78 + 122

= 200

=78+122

=200

=78+122=200