Question

Thực hiện phép tính (tính nhanh nêu có thể)

\(\dfrac{11}{15}.\dfrac{4}{11}+\dfrac{11}{15}.\dfrac{5}{11}+\dfrac{11}{15}.\dfrac{2}{11}\)

Answer 1

\(=\dfrac{11}{15}\cdot\left(\dfrac{4}{11}+\dfrac{5}{11}+\dfrac{2}{11}\right)=\dfrac{11}{15}\cdot\dfrac{11}{11}=\dfrac{11}{15}\)

Answer 2

`11 / 15 . 4 / 11 + 11 / 15 . 5 / 11 + 11 / 15 . 2 / 11`

`= 11 / 15 ( 4 / 11 + 5 / 11 + 2 / 11 )`

`= 11 / 15 . 11 / 11`

`= 11 / 15 .  1 = 11 / 15`

Answer 3

=\(\dfrac{11}{15}.\left(\dfrac{4}{11}+\dfrac{5}{11}+\dfrac{2}{11}\right)=\dfrac{11}{15}.=\dfrac{11}{15}\)