1. (5 points) Calculate: $(2.016+201) \times 201.7-20.16 \times(20.17+2010)=$
【Solution】Solution: Original expression $=(20.16+2010) \times 20.17-20.16 \times 20.17-20.16 \times 2010$
$$
\begin{array}{l}
=20.16 \times 20.17+2010 \times 20.17-20.16 \times 20.17-20.16 \times 2010 \\
=20.16 \times 20.17-20.16 \times 20.17+2010 \times(20.17-20.16) \\
=2010 \times 0.01 \\
=20.1
\end{array}
$$

Therefore, the answer is: 20.1