Where can I find a book on quick mental counting?

O

Oleg2015-08-25 12:55:53

Books

Oleg, 2015-08-25 12:55:53

About a year ago, I found a book on the net (in English) containing quick counting techniques in my mind (multiplying two-digit and three-digit numbers among themselves, extracting a root, approximate calculations, etc.) Then I casually ran through it in the hope of devoting more time when I was free time. Now I can't remember the author or the title.
Can anyone help me find this book or recommend a similar one?

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7 answer(s)

C

Cyril, 2015-08-25
@stk

Bill Handley "Count in your mind like a computer." The network has a normal pdf in Russian.
"Trachtenberg Speed System of Basic Mathematics" is also not hard to find.

T

turbomann, 2015-09-03
@turbomann

"Perelman Yakov - Quick counting. Thirty simple tricks of mental counting."

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Evgeny Bukharev, 2015-08-25
@evgenybuckharev

There is an app for android "Math Tricks", try it

A

Aleksandr Sh, 2015-08-26
@DarkWolf13

Look up Magnitsky's mathematics. Of course, you will have to get used to reading Old Church Slavonic, but the book is worth it.

V

Vladimir pervokvaker, 2015-09-03
@Keroro

"Fast mind. How to forget the superfluous and remember the right"

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Ed_d, 2021-01-11
@Ed_d

Eduard Birdin's book "Quick counting in the mind. Tutor-simulator". The best.