Painless Mental Math: Quick, Easy, and Useful Ways to Become a Human Calculator (Even If You Suck At Math)
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Stop fearing math - tips and tricks to ditch the calculator and never make embarrassing errors again.
Mental math is not as hard as you think it is. Well, the way you’ve been doing it is probably pretty difficult, but there’s a better, simpler way.
Easily calculate: tax, tips, discounts, weights, conversions, and meaurements.
Painless Mental Math is a shortcut to understanding how math really works - far differently from your childhood textbooks. It will give you techniques to use math in ...























