Question

(0,5 điểm) Tính: 

$\sqrt{25}.\left( 0,4-1\dfrac{1}{2} \right) : \left[ (-2)^3 : \dfrac{8}{11} \right]$.

Answer 1

\(\sqrt{25}.\left(0,4-1\dfrac{1}{2}\right):\left[\left(-2\right)^3:\dfrac{8}{11}\right]\)

\(=5.\left(\dfrac{2}{5}-\dfrac{3}{2}\right):\left(-8:\dfrac{8}{11}\right)\)

\(=5.\left(-\dfrac{11}{10}\right):\left(-11\right)\)

\(=\dfrac{-11}{2}:\left(-11\right)\)

\(=\dfrac{1}{2}\)

Answer 2

j

 

Answer 3

\(5\).\(\left(0,4-1,5\right):[-8:\dfrac{8}{11}]\)

=5.-11:-11

5

 

Answer 4

\(5\).\(\left(0,4-1,5\right):[-8:\dfrac{8}{11}]\)

=5.-11:-11

5

 

Answer 5

\(5\).\(\left(0,4-1,5\right):[-8:\dfrac{8}{11}]\)

=5.-11:-11

5

 

Answer 6

\(5\).\(\left(0,4-1,5\right):[-8:\dfrac{8}{11}]\)

=5.-11:-11

5

 

Answer 7

\(\sqrt{25}\)*(0,4-\(1\dfrac{1}{2}\)):(\(\left(-2\right)^3\):\(\dfrac{8}{11}\))

=\(\sqrt{25}\)*\(\dfrac{-11}{10}\): ((-8):\(\dfrac{8}{11}\))

= \(\sqrt{25}\)*\(\dfrac{-11}{10}\):(-11)

= 5*\(\dfrac{-11}{10}\):(-11)

= \(\dfrac{-11}{2}\):(-11)

= 0,5