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11 - Mental Math Secrets! - Rapidly Multiply 2-Digit by 1-Digit Numbers!
This is just a few minutes of a complete course.
Get full lessons & more subjects at: http://www.MathTutorDVD.com.
Learn how to rapidly multiply any 2 digit number by a 1 digit number rapidly in your head without a calculator. For example 37x3 or 44x6 is easy to calculate with this method.