SUM is the spreadsheet equivalent of an open invite: it welcomes everything into the total, whether it belongs there or not.

How to Do the Sum of an Indefinite Series in Excel. The Microsoft Excel program includes a variety of mathematical formulas that you can apply to any cell in a spreadsheet.

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

Every Excel expert knows how to navigate without a mouse and how to format data using keyboard shortcuts. But do you know how to insert a sum without typing the formula?