Question

đáp án thôi ạ

Answer 1

\(=3\cdot\left(\dfrac{10}{21}-\dfrac{3}{14}\right)\cdot\dfrac{14}{11}=3\cdot\dfrac{20-9}{42}\cdot\dfrac{14}{11}=3\cdot\dfrac{1}{3}=1\)

Answer 2

\(=3\times\dfrac{11}{42}:\dfrac{11}{14}\)

\(=\dfrac{11}{14}:\dfrac{11}{14}\)

\(=1\)

Answer 3

`= 3 xx 11/42:11/14`

`= 11/14:11/14`

`=1`

Answer 4

= 3 x ( 10/21 - 3/14 ) x 14/11

= 3 x 20 - 9/42 x 14/11

= 3 x 1/3

= 1