Here's a quick video of my daughter making 3,000 with our Base-10 blocks and Cuisenaire Rods. We only have 9 blue hundreds so she had to make another hundred, and, in the process, discovered that 4(1+3+5+7+9) = 100! I'm sorry I didn't leave the camcorder on for our discussion about that afterward!

Lots of neat things to discover when you use Cuisenaire Rods!

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