8 x 2.019 x 125 - 250 x 2.018 x 4

= (8 x 125) x 2.019 - (250 x 4) x 2.018

= 1.000 x 2.019 - 1.000 x 2.018

=2.019.000 - 2.018.000

= 1.000

nhớ tick nhe

7*19*25=3325

bạn ơi tính thuận tiện nha

\(\dfrac{14}{9}\) x \(\dfrac{11}{8}-\dfrac{3}{8}\) x \(\dfrac{14}{9}\)

\(=\dfrac{14}{9}\) x \(\left(\dfrac{11}{8}-\dfrac{3}{8}\right)\)

\(=\dfrac{14}{9}\) x \(\dfrac{8}{8}=\dfrac{14}{9}\) x \(1\)

\(=\dfrac{14}{9}\)

oa cảm ơn bạn nhé :3

14/9 × 11/8 - 3/8 × 14/9 

= 14/9 × ( 11/8 - 3/8 ) 

= 14/9 × 8/8 

= 14/9 - 1 

= 5/9

494362

1954 x 253 =494362

1954 x 253 = 494362

494362

Đề hơi khó hiểu bn nhé

\(\left(\dfrac{1}{4}x-\dfrac{1}{8}\right).\dfrac{3}{4}=\dfrac{1}{4}\)

\(\dfrac{1}{4}x-\dfrac{1}{8}=\dfrac{1}{4}:\dfrac{3}{4}=\dfrac{1}{3}\)

\(\dfrac{1}{4}x=\dfrac{1}{3}+\dfrac{1}{8}=\dfrac{11}{24}\)

\(x=\dfrac{11}{24}:\dfrac{1}{4}=\dfrac{11}{6}\)

\(\left(\dfrac{1}{4}x\times\dfrac{-1}{8}\right)\times\dfrac{3}{4}=\dfrac{1}{4}< =>\dfrac{-x}{32}\times\dfrac{3}{4}=\dfrac{1}{4}< =>\dfrac{-x}{32}=\dfrac{1}{4}:\dfrac{3}{4}< =>\dfrac{-x}{32}=\dfrac{1}{3}< =>x=\dfrac{1}{3}\times\left(-32\right)< =>x=\dfrac{-32}{3}\)