# Speed Mathematics : Secret Skills for Quick Calculation

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## Description

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!show more

## Product details

- Paperback | 272 pages
- 152 x 228 x 20mm | 322.05g
- 17 Dec 2010
- John Wiley and Sons Ltd
- John Wiley & Sons Inc
- New York, United States
- English
- 1. Auflage
- 0471467316
- 9780471467311
- 97,104

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## About Bill Handley

BILL HANDLEY is recognized as an authority on teaching and study methods. His methods of teaching mathematics and his strategies for learning and thinking have achieved astonishing results in schools worldwide.show more

## Back cover copy

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 3Subtract diagonally. Either 96--3 or 97-- 4.
The result is the first part of the answer.96 x 97 = 93
4 3Multiply the numbers in the circles. 4 x 3 = 12.
This is the second part of the answer.96 x 97 = 9312
4 3It's that easy!show more

## Table of contents

Preface. Introduction. 1. Multiplication: Part One. 2. Using a Reference Number. 3. Multiplying Numbers Above and Below the Reference Number. 4. Checking Answers: Part One. 5. Multiplication: Part Two. 6. Multiplying Decimals. 7. Multiplying Using Two Reference Numbers. 8. Addition. 9. Subtraction. 10. Squaring Numbers. 11. Short Division. 12. Long Division by Factors. 13. Standard Long Division. 14. Direct Division. 15. Division by Addition. 16. Checking Answers: Part Two. 17. Estimating Square Roots. 18. Calculating Square Roots. 19. Fun Shortcuts. 20. Adding and Subtracting Fractions. 21. Multiplying and Dividing Fractions. 22. Direct Multiplication. 23. Estimating Answers. 24. Using What You Have Learned. Afterword. Appendix A. Frequently Asked Questions. Appendix B. Estimating Cube Roots. Appendix C. Checks for Divisibility. Appendix D. Why Our Methods Work. Appendix E. Casting Out Nines-Why It Works. Appendix F. Squaring Feet and Inches. Appendix G. How Do You Get Students to Enjoy Mathematics? Appendix H. Solving Problems. Glossary. Index.show more