Follow these steps to insert an Excel spreadsheet into PowerPoint:

1. Open Microsoft PowerPoint and select the slide you would like to insert the spreadsheet into.
2. Swtich to the Excel program. Select and copy the data you would like to paste into PowerPoint.
3. Switch back to PowerPoint and paste the copied spreadsheet into the slide.
4. Adjust the size and position of the spreadsheet.
5. Make any additional edits.
6. Save your changes.