Easy Multiplication trick for BIG numbers.

This trick for multiplication is awesome! Multiply numbers near 100 in under 5 seconds. Remember - you don't need a clickbait title to view this - you are far far better than that! Five minutes - you havre another multiplication math trick up your sleeve!

Here is THE mental multiplication lesson playlist - progressing you through your mental multiplication.
https://www.youtube.com/playli....st?list=PLjbxBzUM6SL

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