Excel - Create a simple formula
Adding numbers is just one of the things you can do, but Excel can do other math as well. Try some simple formulas to add, subtract, multiply, or divide your numbers.
1. Pick a cell, and then type an equal sign (=).
That tells Excel that this cell will contain a formula.
2. Type a combination of numbers and calculation operators, like the plus sign (+) for addition, the minus sign (-) for subtraction, the asterisk (*) for multiplication, or the forward slash (/) for division.
For example, enter =2+4, =4-2, =2*4, or =4/2.
3. Press Enter.
This runs the calculation.
You can also press Ctrl+Enter if you want the cursor to stay on the active cell.