328 x 7 + 328 x 2 + 328

= 328 x ( 7 + 2 + 1 )

= 328 x 10

= 3280

328.7+328.2+328

=328.(7+2+1)

=328.10

=3280

 K choPark Bo gum

328 x 7 + 328 x 2 + 328

= 328 x ( 7 + 2 ) + 328

= 328 x 9 + 328

= 328 x 9 + 328 x 1

= 328 x 10

= 3280

Nếu mình đúng thì các bạn k mình nhé 

a) = 65,69

b) = 22500

c) = 0

k mình nha

= 10

10

10

128+(-328)+72+/-328/+(-148)

=128+(-328)+82+328+(-148)

=(128+82)+[(-328)+328]+(-148)

=210+0+(-148)

=62

Phai=52 chu ban

sorry,mk tính nhầm pải là 52

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

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

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

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

Đáp án cần chọn là: A

Viết lộn abcabc=abc.1001=abc.7.11.13 chia hết 11

Sorry Mạnh, là abcabc mới đúng