Absolutely! The SUM function in Excel is designed to work efficiently with ranges of cells. In fact, it's one of the most common ways to use SUM.

Here's how it works:

* Syntax: `=SUM(range1, range2, ...)`
* Arguments:
* `range1`: This is the first range of cells you want to sum the values from. You can specify the range directly (e.g., A1:A10) or select the cells with your mouse.
* `range2, range3, ...`: You can add additional ranges of cells separated by commas to sum their values together in the same formula.

Examples:

* `=SUM(A1:A10)`: This formula sums the values in cells A1 through A10.
* `=SUM(B2:B5, C2:C5)`: This formula sums the values in cells B2:B5 and C2:C5, effectively adding corresponding cells across the two ranges.

Benefits of using ranges:

* Saves time: Instead of manually adding each cell value, you can sum an entire range with one formula.
* Reduces errors: There's less chance of introducing typos by referencing a range instead of individual cells.
* Flexibility: You can easily adjust the range size by dragging the selection or modifying the cell references in the formula.

So, the next time you need to add up a group of cells, remember that the SUM function with ranges is your friend!