\(\dfrac{1}{2}+\dfrac{1}{3}=\dfrac{3}{6}+\dfrac{2}{6}=\dfrac{5}{6}\)
\(\dfrac{3}{5}+\dfrac{11}{15}=\dfrac{9}{15}+\dfrac{11}{15}=\dfrac{20}{15}=\dfrac{4}{3}\)
\(\dfrac{3}{4}+\dfrac{5}{6}=\dfrac{9}{12}+\dfrac{10}{12}=\dfrac{19}{12}\)
\(\dfrac{1}{2}+\dfrac{1}{3}=\dfrac{3}{6}+\dfrac{2}{6}=\dfrac{5}{6}\\ \dfrac{3}{5}+\dfrac{11}{15}=\dfrac{9}{15}+\dfrac{11}{15}=\dfrac{20}{15}=\dfrac{4}{3}\)
\(\dfrac{3}{4}+\dfrac{5}{6}=\dfrac{9}{12}+\dfrac{10}{12}=\dfrac{19}{12}\)