Mental Math Secrets - Your Secret Weapon for Success
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Mental Math - Ep15 - Multiply 3-digit by 3-digit numbers.
15 minutes
Posted Aug 10, 2010 at 10:00 pm.
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MathTutorDVD.com explains how to rapidly multiply 3-digit by 3-digit numbers using the technique of criss-cross multiplication.
Previous
Mental Math - Ep14 - Multiply 3-digit by 2-digit numbers.
Next
Mental Math - Ep16 - Divide by 0.5, or 5, or, 50
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