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How to use the SUM function

The SUM function is a simple function that adds up numbers.

Let's take a look.

The SUM function sums numeric values. For example, if I enter the formula =SUM(B7:B11), Excel will return 50, the total of all numbers in that range.

SUM simply ignores blank cells.

The formula =SUM(D7:E9) will return 1350. Like blanks, SUM ignores text values.

In addition to ranges, SUM can work with individual cells, too. Just separate each additional item with a comma. You are free to combine ranges with individual cell references.


Like other functions that accept multiple values, you can can hold down the control key (command on a Mac) and Excel will add the commas for you, each time you click a new location on the worksheet.

Here, I can use that technique to SUM all of the ranges and cells we've worked with so far.

You can select each of these values individually using the formula hint window that appears when you're editing a function. This is a good way to fix a mistake.

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Author 
Dave Bruns