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Mr. John Hush challenges the class to a speed math calculation. The class may use a calculator; he may not.

Play Math Speed Test (FREE on iOS): https://apps.apple.com/app/id894239890 In this math drill, you get: - 25 multiplication ...

Square any 2 digit number in 3 seconds I Square Root in 3 seconds | Math Olympiad | Harvard University Entrance Exam ...