You can sum cells across multiple sheets in Excel. This article presents steps for Adding single-cell values or Adding values in the range of cells.

How to Enter, Edit, or Delete Formulas in Excel ...

How to Do Averages With Percentages in Excel. Averages are typically computed as the sum of values divided by the number of data points. However, averages are also calculable from percentages.

You can do manual calculations to see if the numbers are correct. Finally, we want to look at how to use the SUM function to calculate values in one or more Excel columns.

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.

To multiply certain numbers or cell values in Excel, you’ll need to use the * (asterisk; also called "star") operator. To multiply two numbers in Excel, you can type the formula =number1*number2 in ...