The SUM formula can be applied to a certain number or cells or an indefinite series such as an entire column of data, which may grow or shrink at a later time. Launch the Microsoft Excel program ...

How to manually sum in Excel. 1. Click the cell you want the sum to appear in and click "=." 2. Type a number or click a cell that has a value. 3. Type "+." ...

Open Microsoft Excel. Enter the data to be averaged in column A. For example, if you had three regular tests, a midterm and a final, you might enter grades of 85, 100, 90, 80, 95 in cells A1 ...

If you want to sum up multiple cells in your spreadsheet, you must use the SUM formula. When summing multiple cells in Excel, you can add individual values, cell references or ranges, or a mixture ...

Averaging in Microsoft Excel is easy, until you start excluding specific values. Here are three ways to average a data set when giving special consideration to the highest and lowest values.

You can't use a SUM() function to sum a filtered list, unless you intend to evaluate hidden and unhidden values. Here's how to sum only the values that meet your filter's criteria.