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.

You can sum a series of numbers in Microsoft Excel manually by typing in a simple formula, or automatically with a tool.

How to Add the Difference Range In Excel. The simplest way to add cells in Microsoft Excel is using the plus operator, such as "=A1+A2," but that method fails when adding different ranges.