Practice with Unlike Denominators

$8\frac{4}{5}-\frac{1}{2}= 8\frac{3}{10}$

$4 \dfrac{1}{2}+1 \dfrac{2}{5}=5 \dfrac{9}{10}$

$6 \dfrac{2}{5}-3\dfrac{1}{4}=  3\frac{3}{20}$

$\dfrac{2}{3}+2 \dfrac{1}{6}=2 \dfrac{5}{6}$