simplify 5 1/3 + (-3 9/18)
\(5\dfrac{1}{3}+\left(-3\dfrac{9}{18}\right)=5\dfrac{1}{3}-3\dfrac{1}{2}=5\dfrac{1\cdot2}{3\cdot2}-3\dfrac{1\cdot3}{2\cdot3}=5\dfrac{2}{6}-3\dfrac{3}{6}\\\\=4\dfrac{8}{6}-3\dfrac{3}{6}=1\dfrac{5}{6}\)
