Question

tinh thuận tiên 2/3×4/9+2/3×5/9

 

Answer 1

\(\dfrac{2}{3}\times\dfrac{4}{9}+\dfrac{2}{3}\times\dfrac{5}{9}\\ =\dfrac{2}{3}\times\left(\dfrac{4}{9}+\dfrac{5}{9}\right)\\ =\dfrac{2}{3}\times\dfrac{9}{9}\\ =\dfrac{2}{3}\times1\\ =\dfrac{2}{3}.\)

Answer 2

`2/3 xx 4/9 + 2/3 xx 5/9 `

`= 2/3 xx (4/9 + 5/9)`

`= 2/3 xx 1`

`= 2/3`