This model shows $\frac{2}{5}+\frac{3}{10}$.
$\frac{1}{5}$$\frac{1}{5}$ $\frac{1}{10}$ $\frac{1}{10}$ $\frac{1}{10}$
What is $\frac{2}{5}+\frac{3}{10}$?
$\frac{1}{5}$ | $\frac{1}{5}$ | $\frac{1}{10}$ | $\frac{1}{10}$ | $\frac{1}{10}$ |