Secrets of Mental Math S:1 E:3 Go Forth and Multiply

S:1 E:3 Go Forth and Multiply 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.