Breuken verm. (reeks 3)

Vermenigvuldig de breuken

\(\frac{4}{-13} . \left(\frac{-8}{-4}\right).\frac{5}{6}\)

\(\frac{4}{-13} . \left(\frac{-8}{-4}\right).\frac{5}{6}\\=-\frac{4}{13}.\frac{2}{1}.\frac{5}{6}\\=-\frac{4.2.5}{13.1.6}\\=-\frac{40}{78}\\=-\frac{20}{39}\)