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Vedic Mathematics was rediscovered from ancient Sanskrit texts earlier this century by Bharati Krsna Tirthaji (1884-1960). He found that all problems in pure and applied mathematics can be solved easily with the aid of sixteen simple Sutras, or word-formulae: for example All From 9 and the Last From 10 or Vertically and Crosswise. This may sound incredible but the Vedic system offers a very different approach to mathematics that is both powerful and fun.
The Vedic system is so easy it is really a system of mental mathematics. It has a coherence and beauty that make it very attractive and some of the methods are truly amazing in their efficiency and simplicity. Many schools now teach Vedic Mathematics and a common response from children is: "Why were we not shown this before?".
The Natural Calculator introduces this system; dealing with mental mathematics it covers various types of multiplication, addition, subtraction and division.