How fast can you calculate? Would you like to be faster? This book presents the time honored tricks and tips of calculation, from a fresh perspective, to boost the speed at which you can add -- whether a couple of numbers, or columns so long an accountant may faint. Find out how…
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How fast can you calculate? Would you like to be faster? This book presents the time honored tricks and tips of calculation, from a fresh perspective, to boost the speed at which you can add -- whether a couple of numbers, or columns so long an accountant may faint. Find out how…
"In his latest book, mathematician Alfred S. Posamentier provides easily understandable, easily presentable and easily replicated tricks that one can do with mathematics"--
"In his latest book, mathematician Alfred S. Posamentier provides easily understandable, easily presentable and easily replicated tricks that one can do with mathematics"--
"The book is written simply so anyone can understand. The book teaches simple strategies that will enable you to make lightning calculations, multiplication, division, addition and subtraction, squaring numbers or extracting square roots and cube roots; add and subtract fraction…
"The book is written simply so anyone can understand. The book teaches simple strategies that will enable you to make lightning calculations, multiplication, division, addition and subtraction, squaring numbers or extracting square roots and cube roots; add and subtract fraction…
Many useful procedures explained and taught: 2-column addition, left-to-right subtraction, direct multiplication by numbers greater than 12, mental division of large numbers, more. Also numerous helpful shortcuts. More than 8,000 problems, with solutions. 1945 edition.
