Multiplying Large Numbers

This free math video shows how to easily represent multiplication of numbers in the teens visually. Most children (and adults!) have no understanding of what they are actually doing when they perform the multiplication algorithm. After watching this video and trying it a few times on your own, you should begin to understand what it’s really all about and may even begin to multiply big numbers in your head!

Cuisenaire Rods are an effective tool in developing a conceptual understanding of mathematical topics in children and adults. Our minds remember pictures and color much better than symbols. This is the perfect way to introduce long multiplication.