Breuken optellen (reeks 2)

Tel de breuken op

\(\frac{2}{11}+\frac{11}{9}\)

\(\frac{2}{11}+\frac{11}{9}\\=\frac{18}{99}+\frac{121}{99}\\=\frac{18+121}{99}\\=\frac{139}{99}\)