Traité De Calcul Mental: La Clé De L'arithmétique /: D'après La Méthode Suivi Pour Former Le Patre Calculateur De La Touraine

Ce livre enseigne la méthode la plus efficace pour calculer mentalement, utilisée par les calculateurs professionnels de l'époque. Sur la base du calcul mental rapide, il présente des astuces et des conseils pour effectuer toutes sortes d'opérations mathématiques mentales. C'est une ressource inestimable pour tous ceux qui cherchent à améliorer leurs compétences de calcul mental.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.