1. (5 points) $20132014 \times 20142013$ - $20132013 \times 20142014=$ $\qquad$
$\begin{array}{l}\text { [Solution] Solution: } 20132014 \times 20142013-20132013 \times 20142014 \\ =(20132013+1) \times 20142013-20132013 \times 20142014 \\ =20132013 \times 20142013+20142013-20132013 \times 20142014 \\ =20142013-20132013 \times(20142014-20142013) \\ =20142013-20132013 \\ =10000\end{array}$
Therefore, the answer is: 10000.