Can you explain Olympic Gymnastics scoring to me?

[Libby Pritchett]

I'll admit that the only time I ever watch gymnastics is during the Olympics, so I don't really understand all the ins and outs. I didn't watch the other night, so this is my first time to watch in 4 years.

I'm watching the women's team event tonight, and I don't understand the scoring at all. I thought a "perfect" score was 10? So, why are their scores like 15-16 something? Is that a cumulative score? How do they get that number?