The Excel SUM function is a powerful tool that helps you quickly add up a range of numbers in a spreadsheet. It’s like having a virtual calculator at your disposal, making your calculations much easier and more efficient.

## Syntax

**=SUM(number1, number2, …)**

## Arguments

number1 | The first number you want to add. |

[number2] | (Optional) Additional numbers you want to add. You can include as many as you need, separating them with commas. |

## How to Use

Using the SUM function is as simple as entering it into a cell and specifying the numbers or cell references you want to add. Let’s look at a few examples:

**Example 1:**

If you want to add the numbers in cells A1, A2, and A3, you can use the following formula:

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=SUM(A1, A2, A3) |

**Example 2:**

You can also add a range of cells. For instance, if you want to add all the numbers in cells A1 through A5, you can do it like this:

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=SUM(A1:A5) |

**Example 3:**

If you have a mix of individual numbers and cell references, that’s perfectly fine. Here’s an example:

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=SUM(10, A1, B2, 25) |

And that’s it! The SUM function will calculate the total for you, making it super easy to handle various mathematical operations in your Excel worksheets.