Isbn: 9787544529952 (1 résultats)

paperback. Etat : New. Paperback. Pub Date :2013-12-01 Pages: 90 Language: Chinese Publisher: Changchun Publishing House. relaxed and happy I count quick calculation every day to practice mental arithmetic thin: 2 Year (Vol.2) (who teach standard version) will textbook knowledge conduct a comprehensive. systematic optimization of the design and layout combinations. and keeping up with the progress of teaching. can rapidly improve pupils port operator. mental arithmetic. skills. techniques and basic computing power.…