Speed Mathematics: Secrets Skills for Quick Calculation: Secret Skills for Quick Calculation

by Bill Handley

Using this book will improve your understanding of math and have you performing like a genius!

People who excel at mathematics use better strategies than the rest of us; they are not necessarily more intelligent.

Speed Mathematics teaches simple methods that will enable you to make lightning calculations in your head-including multiplication, division, addition, and subtraction, as well as working with fractions, squaring numbers, and extracting square and cube roots. Here's just one example of this revolutionary approach to basic mathematics:

96 x 97 =
Subtract each number from 100.

96 x 97 =
4 3

Subtract diagonally. Either 96--3 or 97-- 4.
The result is the first part of the answer.

96 x 97 = 93
4 3

Multiply the numbers in the circles. 4 x 3 = 12.
This is the second part of the answer.

96 x 97 = 9312
4 3

It's that easy!

Genres: Mathematics, Nonfiction, Parenting, Academics

272 pages, Kindle Edition

First published October 20, 2003

Reviews

[Liquidlasagna · Rating 3 out of 5]

I would say that for 80% of purposes, the Trachtenberg system is superior

but there are certain useful facets in this book as well
adding and subtraction methods
and multiplication tables

[Amir · Rating 3 out of 5]

در تلاش برای نوشتن یک کتاب.

مشکل خیلی از این کتابای ریاضیات سریع اینه که انقدر روش های مختلف و پراکنده ای رو میگن که توی ذهن نمی مونه و تلاش من هم الان همینه که یه کتابی بنویسم که این مشکل رو نداشته باشه!!!

گرچه خیلی از مطالبی که گفت هم مفید بود.

[Irene · Rating 4 out of 5]

call me a nerd but this was actually really interesting. It definitely introduced me to a number of clever techniques to approach basic mathematics that I never knew even existed. It was enlightening and quite worth the read especially the lessons on mental calculation which probably didn't stick too well in my head ... way too many numbers. But interesting nevertheless :)

[Avid Reader · Rating 5 out of 5]

Super interesting book.

[addie · Rating 5 out of 5]

Had to brush up on my math skills, can tell that it is definitely interesting and helpful! Loved it. Would definitely recommend this to a parent or a kid hahaha

[Cindy · Rating 4 out of 5]

Now that was interesting! Want to learn a new way to multiply large numbers in your head? This book will teach you if you have the will power to read this slowly and practice. I found it fun to learn, maybe you will too.

[Rania Saleh · Rating 4 out of 5]

nice book, it give an easy shortcuts for many mathematical operations like multiple by 11, or square a number start with 5.

[Jessica · Rating 1 out of 5]

I don't like math

[Terry · Rating 3 out of 5]

Great ! Wish I would have Hadith in grade school.

[Tair Kuanyshev · Rating 4 out of 5]

Very good book with easy technics.