Keynote: is it possible to animate a number based on another number appearing on screen?

Is it possible in Keynote to make a total number "count up" as other numbers appear on screen in a list format?

For example: 2+3+5+7...and so on...and as each number appears on screen when I click my remote for my keynote presentation, the total number adds up.

A number TOTAL climbing in value as other numbers (that make up its total) appear on screen while I click on them to appear.

I know how to do this in After Effects, but is such a thing possible in Keynote?