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Description of  One Useful Mental Mathematics Trick, and 3000 Exercises to Make Sure You Get It Right

Mental mathematics, and quick mind calculations, are a great way to prove that you have good numerical skills and a quick brain. Given that there is an infinite array of possible mathematical calculations, it might seem that mastery of mental mathematics and quick arithmetic would entail millions of mnemonic devices. However, you can remember a few different useful tools, and those are enough for us to solve pretty much any problem you will ever encounter. This book focuses on one such technique, one that can be used to make one fifth of all multiplication problems significantly easier. There is also a large number of sample exercises that you can use to build up speed in a controlled test environment. By the end of the exercises in this book, you will be able to multiply 605 by 605 in twenty seconds, without the use of a calculator, and completely in your head! As a side effect of this main computation, you will also improve your general multiplication skills, and this has an even wider range of applications than the main technique. There are many more other simple techniques you can master to further cut your computation time whenever you are faced with a tricky arithmetic problem. Stay tuned for many more such tricks! I hope you are able to use this technique successfully to impress friends, to seem smarter, and to rely less on machines and more on your brain! Read more