How To Calculate Quickly

By Henry Sticker -

No Synopsis Available.

• Format: Paperback
• Language: English
• ISBN: 0486461572
• ISBN13: 9780486461571
• Release Date: January 1956
• Publisher: Dover Press -
• Weight: 0.55 lbs.

Customer Reviews

Amazing what you can do quickly with your fingers.

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.