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The Trachtenberg speed system of basic mathematics
Source: Open Library ·
By Ann Cutler (1960). 3 recommendations on Hacker News.
Why it's interesting
Hacker News rank #6706, 5 mentions, 3 recommenders.
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What is The Trachtenberg speed system of basic mathematics?
The Trachtenberg speed system of basic mathematics is a book discovery curated from Open Library. By Ann Cutler (1960). 3 recommendations on Hacker News.
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