There are a few ways to fix broken cell references after copying formulas in Excel:

1. Absolute vs. Relative References:

* Understand the difference: By default, Excel uses relative references which adjust based on where the formula is copied. Absolute references lock onto specific cell locations (e.g., `$A$1`).
* Fix: If you need a fixed reference, use `F4` after entering the cell address in your formula to convert it to absolute.

2. Copy and Paste Options:

* Use Paste Special: Right-click on the pasted cell and choose "Paste Special..." In the options, select "Values" to paste only the calculated result, or "Formulas" to keep the formula but convert references to absolute.

3. Find and Replace:

* Use Ctrl+H for "Find and Replace." In "Find," enter the incorrect relative reference (e.g., B2). In "Replace with," enter the desired absolute or corrected reference (e.g., $B$2). Use caution with this method for large datasets.

4. Keyboard Shortcuts:

* Use `F2` to edit the formula directly. You can then manually adjust the cell references as needed.

Choosing the Right Method:

The best method depends on the situation:

* For a few formulas with specific references needed, use absolute references or edit directly.
* For consistent changes across a range, use Paste Special or Find and Replace (cautiously).

By understanding these methods, you can effectively fix broken cell references and maintain accurate formulas in your Excel spreadsheets.