Breuken optellen (reeks 2)

Tel de breuken op

\(\frac{-5}{6}+\frac{2}{9}\)

\(\frac{-5}{6}+\frac{2}{9}\\=\frac{-15}{18}+\frac{4}{18}\\=\frac{-15+4}{18}\\=\frac{-11}{18}\\=\frac{11}{-18}\)