✓ Lire en ligne Û Mathématiques d'école : Nombres, mesures et géométrie Par Daniel Perrin ✓ affaires d'édition

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Les math matiques d cole dont nous parle Daniel Perrin sont celles de tout le monde nombres, g om trie, aires, volumes Nous sommes familiers avec ces notions depuis notre plus tendre enfance, et pourtant elles pr sentent des difficult s inattendues d s qu on veut les cerner d un peu plus pr s Cela n avait pas chapp aux Grecs de l Antiquit , qui s taient attach s donner de ces notions des d finitions pr cises, et qui en avaient tabli les propri t s avec un souci de rigueur qui nous d concerte parfois aujourd hui Mais ils le savaient sinon, gare au paradoxe Ces difficult s, bien s r, doivent tre soigneusement cach es aux l ves de l cole l mentaire et du coll ge, mais pas leurs ma tres qui doivent savoir si, oui ou non, 0,999 1 la question leur est souvent pos e , ou pourquoi le nombre n qui intervient dans le p rim tre du cercle est aussi celui qui figure dans l aire du disque Les notions premi res, celles que chaque enseignant doit ma triser, sont donc ici justifi es, expliqu es, comment es dans un expos agr able les d monstrations un peu arides sont report es en annexe et qui ne s carte jamais du terrain tr s concret choisi au d part Mais les math matiques ne se limitent pas cette exigence de rigueur intellectuelle Le plaisir de la recherche et la joie de la d couverte en sont des composantes essentielles Partant d un niveau l mentaire les math matiques du baccalaur at scientifique , le livre de Daniel Perrin nous entra ne tr s loin dans la red couverte des nombres et de la g om trie On y rencontre les myst res des nombres premiers ou de l criture d cimale des fractions, on y explique la beaut des constructions la r gle et au compas, ou les secrets des d coupages des polygones, on y d couvre les patrons des poly dres ou la merveilleuse formule d Euler Le lecteur pourra satisfaire son go t de la recherche en se confrontant plus de 200 exercices, tous passionnants, tous corrig s, et une cinquantaine de probl mes N d un cours pour les futurs professeurs d cole dans le cadre de la licence pluridisciplinaire d Orsay , ce livre s adresse aussi aux professeurs du second degr et tous les tudiants en math matiques.Daniel Perrin est professeur l IUFM de Versailles et l universit Paris Sud Il est l auteur de G om trie alg brique, une introduction, EDP Sciences, 1995, et de Cours d alg bre, Ellipses, 1996 Math World of Math Online Free math lessons and math homework help from basic math to algebra, geometry and beyond Students, teachers, parents, and everyone can find solutions to their math problems instantly Cool Math free online cool math lessons, cool math Cool Math has free online cool math lessons, cool math games and fun math activities Really clear math lessons pre algebra, algebra, precalculus , cool math games, online graphing calculators, geometry art, fractals, polyhedra, parents and teachers areas too Math Khan Academy Watch videos and practice your skills for almost any math subject Cool Math Games Free Online Math Games, Cool Coolmath was designed for the frustrated, the confused,the bored students of the world who hate math and for math geeks of the world who love all things math Math Games Give Your Brain A Workout Math games and at MathPlayground Problem solving, games, and puzzles the entire family will enjoy Math BrainPOP BrainPOP s math movies cover all sorts of calculations and computations Tim and Moby talk you through algebra, probability, geometry, and even data analysis IXL Math Online math practice Practice math online with IXL Our site offers thousands of online math practice skills covering pre K to high school, with questions that adapt to a Free Online Math Games Math Playground Math Playground has hundreds of free, online math games that teach multiplication, fractions, addition, number sense, geometry, algebra, problem solving, and Aplusmath Free Math Worksheets, Math Games, Math Free math learning resources for teachers and students including games, flashcards, homework helpers, and worksheets Math Math Practice Free math lessons and math homework help from basic math to algebra, geometry and beyond Students, teachers, parents, and everyone can find solutions to their math problems instantly Math World of Math Online Free math lessons and math homework help from basic math to algebra, geometry and beyond Students, teachers, parents, and everyone can find solutions to their math problems instantly Cool Math free online cool math lessons, cool math Cool Math has free online cool math lessons, cool math games and fun math activities Really clear math lessons pre algebra, algebra, precalculus , cool math games, online graphing calculators, geometry art, fractals, polyhedra, parents and teachers areas too Math Khan Academy Watch videos and practice your skills for almost any math subject Cool Math Games Free Online Math Games, Cool Coolmath was designed for the frustrated, the confused,the bored students of the world who hate math and for math geeks of the world who love all things math Math Games Give Your Brain A Workout Math games and at MathPlayground Problem solving, games, and puzzles the entire family will enjoy Math BrainPOP BrainPOP s math movies cover all sorts of calculations and computations Tim and Moby talk you through algebra, probability, geometry, and even data analysis IXL Math Online math practice Practice math online with IXL Our site offers thousands of online math practice skills covering pre K to high school, with questions that adapt to a Free Online Math Games Math Playground Math Playground has hundreds of free, online math games that teach multiplication, fractions, addition, number sense, geometry, algebra, problem solving, and Aplusmath Free Math Worksheets, Math Games, Math Free math learning resources for teachers and students including games, flashcards, homework helpers, and worksheets Math Math Practice Free math lessons and math homework help from basic math to algebra, geometry and beyond Students, teachers, parents, and everyone can find solutions to their math problems instantly

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