ISBN 10: 7040113899 ISBN 13: 9787040113891
Anbieter: liu xing, Nanjing, JS, China
paperback. Zustand: New. Paperback Pages Number: 269 Language: Chinese. Computing technology tutorial is divided into seven chapters. about the basic knowledge of the abacus. the abacus method of addition and subtraction. the abacus multiplication. abacus division. mental arithmetic and abacus open. our abacus history of the development of profiles. etc. .