Resposta:
Explicação passo-a-passo:
a)[tex]\left(\frac{-4}{6}\right)\left(\frac{5}{3}\right)[/tex]
[tex]\left(\frac{-4}{6}\right)\left(\frac{5}{3}\right)=\\\\-\frac{4}{6}\times \frac{5}{3}=\\\\-\frac{2\times \:2}{6}\times \frac{5}{3}=\\\\-\frac{2\times \:2}{2\times \:3}\times \frac{5}{3}=\\\\-\frac{2}{3}\times \frac{5}{3}=\\\\-\frac{2\times \:5}{3\times \:3}=\\\\-\frac{10}{3\times \:3}=\\\\=-\frac{10}{9}[/tex]
b) [tex]\left(\frac{-5}{6}\right)\div \left(\frac{4}{3}\right)\:\:[/tex]
[tex]\left(\frac{-5}{6}\right)\div \left(\frac{4}{3}\right)\:\:=\\\\=\frac{-\frac{5}{6}}{\frac{4}{3}}\\\\=-\frac{\frac{5}{6}}{\frac{4}{3}}\\\\=-\frac{5\cdot \:3}{6\cdot \:4}\\\\=-\frac{5\cdot \:3}{24}\\\\=-\frac{15}{24}\\\\=-\frac{5}{8}[/tex]
