Respuesta:
[tex] - \frac{4}{6} \times 0.4 = - 0.266666 \\ [/tex]
[tex] \sqrt{ - 27} \div \sqrt{ - 3} = \sqrt{ \frac{ - 27}{ - 3} } = \sqrt{ \frac{9}{1} } = \sqrt{9} = 3[/tex]
[tex]8\pi \div 2 = 4\pi[/tex]
