1. (3 points) $2000-180+220-180+220-180+220-180+220-180+220=$
【Solution】Solution: $2000-180+220-180+220-180+220-180+220-180+220$,
$$
\begin{array}{l}
=2000+220 \times 5-180 \times 5, \\
=2000+(220-180) \times 5, \\
=2000+40 \times 5, \\
=2000+200, \\
=2200 .
\end{array}
$$

Therefore, the answer is: 2200 .