Breuken haakjesregel (reeks 2)

Bereken

\(-\left(\frac{-7}{8}\right) -\left(\frac{4}{-7}\right) +\left(\frac{-7}{-7}\right)\)

\(-\left(\frac{-7}{8}\right) -\left(\frac{4}{-7}\right) +\left(\frac{-7}{-7}\right)\\= \frac{7}{8}+ \frac{4}{7}+\frac{7}{7}\\=\frac{7}{8}+\frac{4}{7}+\frac{1}{1}\\=\frac{49}{56}+\frac{32}{56}+\frac{56}{56}\\=\frac{49+32+56}{56}\\=\frac{137}{56}\)