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This is a magical way of doing super-fast mental math. Learn to calculate faster than the speeding calculator...........
Mentally solve quadratic equations and inequality. Get A grade easily in AS level Maths exam. OCR edexcel maths past paper solution. Core c1 c2 c3 c4 m1 s1 units .
Lower sixth form maths help and A-level Maths revision
Learn to do square of any number in your head,
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glad2teach link : *******www.metacafe****/watch/791048/fast_math_trick/