Breuken optellen (reeks 1)

Tel de breuken op

\(\frac{7}{3}+\frac{5}{7}\)

\(\frac{7}{3}+\frac{5}{7}\\=\frac{49}{21}+\frac{15}{21}\\=\frac{49+15}{21}\\=\frac{64}{21}\)