MathTutorDVD.com explains how to mentally square numbers near 100.

Mental Math - Ep10 - Square Numbers close to 100

Learn how to rapidly do Math calculations in your head!  Perfect for students in algebra, geometry, calculus, or any math course.  Also great to get an edge in business or in the workplace.  Also very helpful for students taking the GRE, SAT, LSAT, MCAT, and other standardized tests.  Free yourself from using calculators and iphone applications to do basic math.  Impress your friends with your mental math abilities!

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Learn how to rapidly do Math calculations in your head! Perfect for students in algebra, geometry, calculus, or any math course. Also great to get an edge in business or in the workplace. Also very helpful for students taking the GRE, SAT, LSAT, MCAT, and other standardized tests. Free yourself from using calculators and iphone applications to do basic math. Impress your friends with your mental math abilities!

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Mental Math - Ep10 - Square Numbers close to 100

Mental Math - Ep10 - Square Numbers close to 100