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	Notice: Undefined variable: deze_art_online_id in /websites/users/pyth/public_html/pythwww/mmmcms/public/menu.php on line 51 \ \ voorpagina Pygram-prijsvraag prijsvragen puzzels wis-spellen veelvlakken drogredeneringen vermoedens topologie rekenwerk links			Abonnementen en adreswijzigingen: 0522 855175 • English • Contact • Abonnementen
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			Notice: Undefined variable: trefwoord in /websites/users/pyth/public_html/pythwww/mmmcms/includes/find_trefwoord.php on line 687 Notice: Undefined variable: trefwoord in /websites/users/pyth/public_html/pythwww/mmmcms/includes/find_trefwoord.php on line 699 Notice: Undefined variable: trefwoord in /websites/users/pyth/public_html/pythwww/mmmcms/includes/find_trefwoord.php on line 703 Gevonden : vingers Notice: Undefined variable: isalgeweest in /websites/users/pyth/public_html/pythwww/mmmcms/includes/find_trefwoord.php on line 492 Notice: Undefined variable: isalgeweest in /websites/users/pyth/public_html/pythwww/mmmcms/includes/find_trefwoord.php on line 558 Gevonden artikelen in archief: Notice: Undefined variable: zoekresultaat in /websites/users/pyth/public_html/pythwww/mmmcms/includes/find_trefwoord.php on line 570 Notice: Undefined variable: br in /websites/users/pyth/public_html/pythwww/mmmcms/includes/contentbasis.php on line 385 Rekenen op je vingers Vingers gebruiken bij het rekenen is iets voor kleuters, vinden we tegenwoordig. Maar nog geen honderd jaar geleden gebruikten boeren in afgelegen gebieden hun vingers om een som als 7 × 8 of 11 × 14 uit te rekenen. Wie dit boeren-vermenigvuldigen ooit bedacht, is niet bekend, wel dat het duizenden jaren geleden moet zijn geweest. Sporen wijzen erop dat de techniek wijd verbeid was van het Verre Oosten tot Noord-Afrika en Europa. Zie archief: jaargang 43, nummer 4, februari 2004 (totaal gevonden: 1) Notice: Undefined variable: dezecatagorie_id in /websites/users/pyth/public_html/pythwww/mmmcms/includes/oppapier.php on line 32 Notice: Undefined variable: dezecatagorie_id in /websites/users/pyth/public_html/pythwww/mmmcms/includes/oppapier.php on line 32 Notice: Undefined variable: dezecatagorie_id in /websites/users/pyth/public_html/pythwww/mmmcms/includes/oppapier.php on line 32 Notice: Undefined variable: dezecatagorie_id in /websites/users/pyth/public_html/pythwww/mmmcms/includes/oppapier.php on line 32 Notice: Undefined variable: dezecatagorie_id in /websites/users/pyth/public_html/pythwww/mmmcms/includes/oppapier.php on line 32 Notice: Undefined variable: br in /websites/users/pyth/public_html/pythwww/mmmcms/includes/contentbasis.php on line 385 Notice: Undefined variable: oppapier in /websites/users/pyth/public_html/pythwww/mmmcms/includes/oppapier.php on line 49 Notice: Undefined variable: br in /websites/users/pyth/public_html/pythwww/mmmcms/includes/contentbasis.php on line 385 Notice: Undefined variable: br in /websites/users/pyth/public_html/pythwww/mmmcms/includes/contentbasis.php on line 385 Notice: Undefined variable: br in /websites/users/pyth/public_html/pythwww/mmmcms/includes/contentbasis.php on line 385 Notice: Undefined variable: br in /websites/users/pyth/public_html/pythwww/mmmcms/includes/contentbasis.php on line 385 Notice: Undefined variable: br in /websites/users/pyth/public_html/pythwww/mmmcms/includes/contentbasis.php on line 385 Notice: Undefined variable: br in /websites/users/pyth/public_html/pythwww/mmmcms/includes/contentbasis.php on line 385 Notice: Undefined variable: br in /websites/users/pyth/public_html/pythwww/mmmcms/includes/contentbasis.php on line 385 Notice: Undefined variable: br in /websites/users/pyth/public_html/pythwww/mmmcms/includes/contentbasis.php on line 385 \ pythagoras op papier   laatste nummer • vorig nummer • archief • over pythagoras abonnementen • posters • oude jaargangen • kennismakingsnummer • Van viervlak naar ster