Trachtenberg System Multiply by 12 Method Be Faster than a Calculator
YOUR LINK HERE:
http://youtube.com/watch?v=pJ9MpONJkLM
How to multiply by 12 using the Trachtenberg Method of Speed Mathematics (http://www.trachtenbergsystem.org/mul.... • This quick maths method is similar to vedic maths, visit our site for more info and download our free PDF version of the Trachtenberg System of Basic Mathematics book.
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