Secrets of Mental Math
Go Forth and Multiply (1x3)
Uitzenddatum: Jan 15, 2011
Delve into the secrets of easy mental multiplication—Professor Benjamin's favorite mathematical operation. Once you've mastered how to quickly multiply any two-digit or three-digit number by a one-digit number, you've mastered the most fundamental operations of mental multiplication and added a vital tool to your mental math tool kit.
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