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Quick score. Thirty Simple Methods of Oral Accounting

1.99 €
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Quick score. Thirty Simple Methods of Oral Accounting
1.99 €
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Yakov Perelman is a famous Soviet mathematician and popularizer of exact sciences. His book is a collection of simple oral counting techniques that will help you quickly make calculations in your mind without paper and calculator. The manual contains the basic ways of performing multiplication, division and squaring. Successful mastering of the technique of quick counting does not imply mechanical memorization, but is based on mathematical logic. Regular drills for practicing skills do not require additional materials, so they can be performed at any time. Knowing simple counting techniques makes everyday life easier, and also perfectly trains memory and develops abstract thinking. This book is useful not only for students, but also for adults for effective control of financial expenditures.
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