Click the "Add Number" button to add a number to the list do not add "0" by itself or " " at all. this is because it will divide wrong if you do it. To delete these or numbers you entered by accident, click the "Delete Number" button and type the item number (Not the number itself, but the identifying number next to it. click "Get My Average" to get your average once you finish.
Thanks for trying! Tell me about any glitches. Thanks to Kayla Tennessen for teaching me to average. I give credit to Da Button Factory for its button-making tool.