Launch Excel or open an existing table with numbers to add. Type the calculation into the cell you want to place the result, for eg =15+25+4+10+5, Press the Enter key to see the result. 2] How to ...

Add Numbers in Excel Performing addition in Excel is fairly straightforward. You can either add numbers directly or use cell references to work with values stored in specific cells.

Launch Microsoft Excel 2010 and open the spreadsheet you want to edit. Select the worksheet for which you want to insert the page number. Click the "View" tab on the upper side of the Excel window.