Select the cell where you want the result
Type `=`
Enter the formula using cell references, numbers, and operators
Press `Enter`
Use functions like `SUM`, `AVERAGE`, `IF`, or `COUNT` when needed
Click a cell reference instead of typing it to add it to the formula
Use `+`, `-`, `*`, `/`, and `^` for calculations
Use parentheses to control the order of operations
Copy formulas to other cells by dragging the fill handle
Edit a formula by selecting the cell and using the formula bar
Use AutoSum to quickly insert common formulas
Check for errors if the formula does not calculate correctly