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jflowers45
on Feb 23, 2017
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Tips to Improve Your Mental Math Ability
reminds me of one of my favorite books from when I was a kid -
https://www.amazon.com/Math-Magic-Everyday-Problems-Revised/...
dwe3000
on Feb 23, 2017
[–]
One of my favorites from eighth grade was Isaac Asimov's Realm of Algebra - I read that before any of his other books.
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