# How to become a lightning calculator

Author: Anonymous

Genre: Category: Mathematics

Language: English

License: Public domain

Source: https://www.gutenberg.org/ebooks/65078

Amazon editions: https://www.amazon.com/s?k=How+to+become+a+lightning+calculator+Anonymous&tag=cyberlibrar00-20

## Summary

Accuracy should be first considered, then rapidity. Quick adders, by the way, are the most accurate. Write the numbers in vertical lines, avoiding irregularity. This is important. Keep your thought on results not numbers themselves. Do not reckon 7 and 4 are 11 and 8 are 19, but say 7, 11, 19 and so on.

## Chapters

- [Part 1](https://www.cyberlibrary.org/en/books/how-to-become-a-lightning-calculator-65078/chapters/1/index.md)