Currently Being ModeratedFeb 8, 2013 4:46 AM (in response to Darrell1148)
Berfore we jump to the answer, please allow me to give you the most important suggestion I can: Read the first four chapters of the Numbers User Guide. It's free and can be downloaded from a link in the Help menu. Once you have downloaded it, Save it to your Desktop so it's handy.
All calculations begin with the equal sign: =
That signals Numbers that what follows is an expression that must be evaluated. To add two cells, write:
=Cell1 + Cell2, where Cell1 and Cell2 are cell addresses such as D1 or F2.
This expression is placed in the cell where you want the answer to appear.