## How mathematics happened: the first 50,000 yearsIn this fascinating discussion of ancient mathematics, author Peter Rudman does not just chronicle the archaeological record of what mathematics was done; he digs deeper into the more important question of why it was done in a particular way. Why did the Egyptians use a bizarre method of expressing fractions? Why did the Babylonians use an awkward number system based on multiples of 60? Rudman answers such intriguing questions, arguing that some mathematical thinking is universal and timeless. The similarity of the Babylonian and Mayan number systems, two cultures widely separated in time and space, illustrates the argument. He then traces the evolution of number systems from finger counting in hunter-gatherer cultures to pebble counting in herder-farmer cultures of the Nile and Tigris-Euphrates valleys, which defined the number systems that continued to be used even after the invention of writing. With separate chapters devoted to the remarkable Egyptian and Babylonian mathematics of the era from about 3500 to 2000 BCE, when all of the basic arithmetic operations and even quadratic algebra became doable, Rudman concludes his interpretation of the archaeological record. Since some of the mathematics formerly credited to the Greeks is now known to be a prior Babylonian invention, Rudman adds a chapter that discusses the math used by Pythagoras, Eratosthenes, and Hippasus, which has Babylonian roots, illustrating the watershed difference in abstraction and rigor that the Greeks introduced. He also suggests that we might improve present-day teaching by taking note of how the Greeks taught math. Complete with sidebars offering recreational math brainteasers, this engrossing discussion of the evolution of mathematics will appeal to both scholars and lay readers with an interest in mathematics and its history. |

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#### LibraryThing Review

User Review - fpagan - LibraryThingMainly an account of number systems, metrology, and arithmetic used by prehistoric peoples, Mayans, Egyptians, and Babylonians. The ancient Greeks get only a little coverage, since they came later than 4000 years before the present. Read full review

### Contents

List of Figures | 8 |

Introduction | 21 |

The Birth of Arithmetic | 49 |

Copyright | |

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1-for-10 replacements addition table algebraic notation ancient Egyptian archeological archeologists arithmetic Babylon Babylonian cuneiform Babylonian mathematics base base-10 number binary fraction century clay tablets common fraction concept counters counting cultures cuneiform defined denominator derivation division divisors Egypt Egyptian fractions Egyptian mathematics electronic calculator entries equation example Figure FQ Answer fingers frustum FUN QUESTION geometric algebra geometric-algebra greedy algorithm Greek halving hieratic hieroglyphic hunter-gatherer integers interpretation invented Ishango Bone l-for-6 replacements math mathematicians Maya Mayan number measurement units memorization method metric system modern multiplication table nindan nonterminating fractions number system Papyrus pebble pebble-counting pencil/paper Plimpton 322 positional prime numbers probably problem texts pyramid Pythagoras Pythagorean theorem Pythagorean triples rectangle regular numbers Rhind RMP Problem royal cubit scribes seked sexagesimal simply solution square root subtraction survived symbols Table FQ Answer tables of squares tion unit fractions vigesimal visualization volume word writing written WW WW