Question

(0,5 - 1) x $\sqrt[3]{-8/27}$ + $(1+1/2) ^{-2}$

Answer 1

$(0.5 - 1) \times \sqrt[3]{ - \frac{8}{27} } + (1 + \frac{1}{2} )^{ - 2} \\ \\ ( - 0.5) \times (- \frac{2}{3} ) + ( \frac{3}{2} )^{ - 2} \\ \\ ( - \frac{1}{2} ) \times ( - \frac{2}{3} ) + ( \frac{2}{3} )^{2} \\ \\ \frac{1}{3} + \frac{4}{9} \\ \\ \frac{21}{27} \\ \\ \frac{7}{9}$