Are the slides contiguous? Select them all, then drag.
To select individual clips hold down <ctrl> while clicking. To select a range, click the first, then hold down <shift> and click the last.
Clips can be grouped by selecting them, then right-clicking on one of the selected files and choosing GROUP FILES. They will move in concert.
Clips can also be selected on the timeline, then dragged to the bin. They will vanish from the timeline, and can be replaced there from the bin clips.