In this lesson you can learn how to edit many worksheets at the same time.
Excel allows you to do that.
You want to create the same table for all sheets. Right-click on any tab and select the worksheet Select All Sheets.
This will select all sheets.
When you are making changes to any sheet, these changes will also be present at all the selected sheets.
To ungroup sheets, and then work on one, right-click at any tab and select Ungroup Sheets.