Breuken haakjesregel (reeks 2)

Bereken

\(+\left(\frac{2}{-3}\right) -\left(\frac{-8}{-9}\right) -\left(\frac{-8}{11}\right)\)

\(+\left(\frac{2}{-3}\right) -\left(\frac{-8}{-9}\right) -\left(\frac{-8}{11}\right)\\= \frac{-2}{3}- \frac{8}{9}+\frac{8}{11}\\=\frac{-66}{99}-\frac{88}{99}+\frac{72}{99}\\=\frac{-66-88+72}{99}\\=\frac{-82}{99}\)