If you’ve never seen a Vihart video, you’re truly missing out. She has a way of tackling these interesting math concepts in a way that is completely entertaining and compelling. Well here she does it again while explaining a math concept that I had never heard of, which is that .999.. (repeating) has the same value as 1. If I had just heard someone say this without seeing this video I would have a hard time believing them, but just a minute in to the video you will be a believer as well. Check it out.