By Henry Sticker - How to Calculate Quickly: Full Course in Speed Arithmetic (Dover Books on Mathematics) (Reprint)

By Henry Sticker

No Synopsis Available.

Format:Paperback

ISBN:B00HTJQS74

ISBN13:8601234580775

Release Date:January 1

Publisher:Dover Publications Inc.

Customer Reviews

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Amazing what you can do quickly with your fingers.

Published by bernie4444 , 1 month ago

I found the techniques quite handy, and just explaining them to people would amaze them. We learn about number sense. I had to learn most of this outside of school and was amazed to find many other people who think this way. Horizontal addition, left-to-right multiplication and division, etc., using a Comptometer left-to-right is natural. You do need to do a little practice, so you look efficient when the need arises in the real world. From the book: Arithmetic is a science, but calculation is an art. Science is knowledge – art is a skill.

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By Henry Sticker - How to Calculate Quickly: Full Course in Speed Arithmetic (Dover Books on Mathematics) (Reprint)

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Amazing what you can do quickly with your fingers.

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