Question

[Nguyễn Đức Hải Phong]

Ai làm được bài này đầu tiên , mình tick nha 😁

Answer 1

[Đặng Minh Triết]

a- 1256*(5-4)+1256=1256+1256=2512

b-= 2/3

Answer 2

[Duc Nguyen]

\(a.1256\times5-4\times1256+1256\)

\(=1256\times5-4\times1256+1256\times1\)

\(=1256\times\left(5-4+1\right)\)

\(=1256\times2\)

\(=2512\)

\(b.\dfrac{2}{3}\div\dfrac{6}{2}+\dfrac{2}{3}\div\dfrac{6}{3}+\dfrac{2}{3}\div6\)

\(=\dfrac{2}{3}\times\dfrac{2}{6}+\dfrac{2}{3}\times\dfrac{3}{6}+\dfrac{2}{3}\times\dfrac{1}{6}\)

\(=\dfrac{2}{3}\times\left(\dfrac{2}{6}+\dfrac{3}{6}+\dfrac{1}{6}\right)\)

\(=\dfrac{2}{3}\times1\)

\(=\dfrac{2}{3}\)