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.

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 ...

How to use AutoSum in Excel. AutoSum works best when you have a column or row of numbers you want to add up. 1. Click the empty cell underneath the column of numbers that you want to add up.