I can figure them pretty closely sometimes by cubing certain easy-to-multiply numbers and tinkering with them until the product is pretty close to the number I'm trying to find the cube root to. I know the values for 10 cubed, 15 cubed, 20 cubed, 25 cubed, 30 cubed, and and a few others, or can figure them pretty fast-- and that helps if the number I'm trying to find the cube root for is close to one of those. But getting a close answer that way is time-consuming, and is never quite right. The Internet shows two different formulas, but doesn't explain on the level of "an idiot's guide to cube roots", which is what I need! No particular reason. With minimal math background, I've become fascinated with working math problems lately.
2007-04-02
18:07:37
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3 answers
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asked by
John (Thurb) McVey
4
in
Mathematics