Question

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Answer 1

Resposta:

$\ \ \ \frac{1}{2}:\big(-\frac{8}{3} \big) +\frac{2}{3} \cdot\big(-\frac{20}{8} \big)\\\\=\frac{1}{2}\cdot\big(-\frac{3}{8} \big) -\frac{40}{24}\\\\=-\frac{3}{16}-\frac{40^{:8}}{24_{:8}}\\\\=-\frac{3}{16}-\frac{5}{3}\\\\=-\frac{9}{48}-\frac{80}{48}\\\\\\=\frac{-9-80}{48}\\\\=-\frac{89}{48}$

Explicação passo-a-passo: