Speed Math

Introduction

Can you multiply 98 × 97 in your head in less than five seconds?

You may think doing such a problem in your head is a pipe dream, but it’s not. In fact, doing math without a calculator is critical. In places such as the United Kingdom, calculators are being banned from math tests. So if you can’t do the math in your head or on a piece of paper, you’re stuck.

This is where speed math comes in. By using the methods in this book, you’ll become more adept at solving problems, including the following:

• Addition and subtraction
• Multiplication and division
• Fractions and decimals
• Squares and square roots
• Numbers to different powers

And that doesn’t cover everything you’ll learn. In fact, by the end of this book, you’ll be amazed at how ...