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1. 1vote
   
   ThemBid.com » Blog Archive » Do Math Quickly in Your Head
   Added Aug 07, 2007 by aseldow
   Some time ago a picked up a cool little book called “Short-Cut Math” by Gerard W. Kelly. It’s promise was to increase my calculation ability (in my head) up to three times. Following are the tips that stayed with me since I read the book and that I found most useful.
   tags: math, mental math, math resources
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2. 1vote
   
   Math by Grade (K-8) and Topic
   Added Jul 17, 2007 by tomderis
   tags: math, addition, algebra, comparing, counting, decimals, division, equations, estimation, exponents, fractions, geometry, graphs, measurement, mental math, money, multiplication, naming numbers, patterns, percent, place value, practical math, properties, ratios, statistics, subtraction, kindergarten, first grade, second grade, third grade, fourth grade, fifth grade, sixth grade
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3. 1vote
   
   How to Do Cube Roots of 9 Digit Numbers in Your Head
   Added Oct 16, 2006 by aseldow
   (Just in case you don't already know.) A number cubed is that number times itself times itself. For example, 4 cubed, normally written 43, is 4 × 4 × 4 = 64. The cube root goes in the opposite direction, so the cube root of 64 is 4. To give a larger example, 657 cubed = 657^3 = 657 × 657 × 657 = 283593393, so the cube root of 283593393 is 657.
   tags: math, t214, education, mathematics, cube roots, mental math, math extra credit, math tricks
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