Breuken haakjesregel (reeks 1)

Bereken

\(-\left(\frac{-10}{7}\right)+\left(\frac{-10}{13}\right)\)

\(-\left(\frac{-10}{7}\right)+\left(\frac{-10}{13}\right)\\= \frac{10}{7}-\frac{10}{13}\\=\frac{130}{91}-\frac{70}{91}\\=\frac{130-70}{91}\\=\frac{60}{91}\)