1. (8 points) Calculate: $2013+201+20-13+3=$
【Solution】Solution: $2013+201+20-13+3$
$$
\begin{array}{l}
=(2000+13)+(200+1)+20-13+3 \\
=(2000+200+20)+(13-13+1+3) \\
=2220+4 \\
=2224
\end{array}
$$

Therefore, the answer is: 2224.