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Becoming a Mental Math Wizard
Covers the basics of squaring, multiplication, division, logarithms, powers and roots, and shows how to apply the math to real-life situations.
- GenresMathematics
191 pages, Paperback
First published November 1, 1991
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Displaying 1 of 1 review
November 20, 2013
A delightful book that goes beyond the usual arithmetic to trig functions, power functions, and the like.
For example: "You can square any number"
(N+1)^2 = N^2 + 2N + 1
(N-1)^2 = N^2 - 2N + 1
(N+2)^2 = N^2 + 4N + 4
(N-2)^2 = N^2 - 4N + 4
(A+B)(A-B) = A^2 - B^2
Alas, last I knew it was out of print. Therefore, I bought up several used copies while it was still around.
I know nothing about them, but on page 187 the book The Working Memory Advantage: Train Your Brain to Function Stronger, Smarter, Faster recommends Rapid Math Tricks & Tips: 30 Days to Number Power and Mind Games: Amazing Mental Arithmetic Tricks Made Easy.
For example: "You can square any number"
(N+1)^2 = N^2 + 2N + 1
(N-1)^2 = N^2 - 2N + 1
(N+2)^2 = N^2 + 4N + 4
(N-2)^2 = N^2 - 4N + 4
(A+B)(A-B) = A^2 - B^2
Alas, last I knew it was out of print. Therefore, I bought up several used copies while it was still around.
I know nothing about them, but on page 187 the book The Working Memory Advantage: Train Your Brain to Function Stronger, Smarter, Faster recommends Rapid Math Tricks & Tips: 30 Days to Number Power and Mind Games: Amazing Mental Arithmetic Tricks Made Easy.
Displaying 1 of 1 review