Multiplying on your Fingers 6X6 to 10X10

Looking for a good multiplications trick? There are many ways to remember your nines tables, but what about the sixes and sevens? In this video we look at how to use a multiplication trick for 6 times 6 to 10 times 10.

Ok, this is a cool trick, and to understand why it works you need a little bit of algebra. To see the proof click the “did you know” on the left.