9781507796511-150779651X-The Best Mental Math Tricks

The Best Mental Math Tricks

ISBN-13: 9781507796511
ISBN-10: 150779651X
Author: Talwalkar, Presh
Publication date: 2015
Publisher: CreateSpace Independent Publishing Platform
Format: Paperback 163 pages
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Book details

ISBN-13: 9781507796511
ISBN-10: 150779651X
Author: Talwalkar, Presh
Publication date: 2015
Publisher: CreateSpace Independent Publishing Platform
Format: Paperback 163 pages

Summary

Acknowledged authors Talwalkar, Presh wrote The Best Mental Math Tricks comprising 163 pages back in 2015. Textbook and eTextbook are published under ISBN 150779651X and 9781507796511. Since then The Best Mental Math Tricks textbook was available to sell back to BooksRun online for the top buyback price or rent at the marketplace.

Description

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 these are the leading digits of the answer. Now we just write 25 as the last two digits, so we get 1225. And that's it! We have calculated 35 squared is 1,225 in an amazingly simple way! Math does not have to be hard. The Best Mental Math Tricks is a collection of methods that can help you become a lightning calculator and look like a genius. You will learn how to solve daily problems like calculating percentages and figuring out which day your birthday is every year. Then you will learn how to square numbers, multiply numbers, divide numbers, and even solve complex problems like calculating the cube root of numbers in your head! Each method is explained in detail with numerous examples. Every method is mathematically justified with a formal proof. Each section also contains practice problems accompanied with complete solutions so you can try the method and check your work.

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