Resposta:
Alternativa D
Explicação passo-a-passo:
[tex] {4}^{ - 1} + 3 \times {2}^{ - 3} \div \frac{5}{8} - 0.4 \\ \\ \frac{1}{4} + 3 \times \frac{1}{ {2}^{3} } \div \frac{5}{8} - \frac{4}{10} \\ \\ \frac{1}{4} + 3 \times \frac{1}{8} \div \frac{5}{8} - \frac{2}{5} \\ \\ \frac{1}{4 } + \frac{3}{8} \div \frac{5}{8} - \frac{2}{5} \\ \\ \frac{1}{4} + \frac{3}{8} \times \frac{8}{5} - \frac{2}{5} \\ \\ \frac{1}{4} + \frac{3}{5} - \frac{2}{5} \\ \\ \frac{(5 \times 1) + (4 \times 3) - (4 \times 2)}{4 \times 5} \\ \\ \frac{5 + 12 - 8}{20} \\ \\ \frac{17 - 8}{20} \\ \\ \frac{9}{20} [/tex]
