\[\boxed{\text{5.152.}}\]
\[\textbf{а)}\ Пять\ дробей,\ которые\ \]
\[меньше\ \frac{1}{1000}:\]
\[\frac{1}{1001};\ \frac{1}{1002};\ \frac{1}{1003};\ \frac{1}{1004};\ \]
\[\frac{1}{1005}\text{.\ }\]
\[\textbf{б)}\ Пять\ дробей,\ которые\ \]
\[больше\ \frac{1}{1000}:\]
\[\frac{1}{995};\ \frac{1}{996};\ \frac{1}{997};\ \frac{1}{998};\ \frac{1}{999}\text{.\ \ }\]