These simple math secrets and tricks will forever change how you look at the world of numbers. Secrets of Mental Math will have you thinking like a math genius
Did you know that it's easier to add and subtract from left to right, rather than the other way round? And that you can be taught to square a three-digit number
Discover the Mental Math Secrets to Become a Human Calculator! Schools taught you a way to do math that works when you have a pen & paper. But the same methods,
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