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The Best Mental Math Tricks
The Best Mental Math Tricks
Author: Presh Talwalkar
Can you multiply 35x35 in your head? That is, can you square the number 35? There's a mental math trick so that you can easily square any number ending in 5. Here's how the trick works. Look at the first digit of 35, which is the number 3. We add one to that number, 4, and then multiply those two numbers together. So we have 3x4 = 12, and thes...  more »
ISBN-13: 9781507796511
ISBN-10: 150779651X
Publication Date: 1/31/2015
Pages: 164
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Publisher: CreateSpace Independent Publishing Platform
Book Type: Paperback
Members Wishing: 1
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