12∞ · Question 6.7.10
How do human calculators perform lightning arithmetic?
With memorized number facts, clever shortcuts, and heavy practice, sometimes using an imagined abacus.
From the book 12∞ Twelve to Infinity by D.R. Davenport. The full answer is free to read with an iBelieve account.
Where it sits in the book
- Part
- 6: Humanity Unlocked
- Gate
- 6.7: Exceptional Humans
- In print
- Page 200
- ← 6.7.9 · How do some people learn dozens of languages?
- 6.7.11 → · What is sensory substitution?
- All of Part 6
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