Breuken optellen (reeks 1)

Tel de breuken op

\(\frac{7}{4}+\frac{7}{9}\)

\(\frac{7}{4}+\frac{7}{9}\\=\frac{63}{36}+\frac{28}{36}\\=\frac{63+28}{36}\\=\frac{91}{36}\)