ISBN 10: 7534684471 ISBN 13: 9787534684470
Seller: liu xing, Nanjing, JS, China
paperback. Condition: New. Paperback. Pub Date: 2015-06-01 Pages: 84 Language: Chinese Publisher: Jiangsu Phoenix Children's Publishing House. I count little champion: Primary Mathematics port operator quick calculation exercises every day (grade four Beijing Normal University) features: port operator mental arithmetic training tactical training using a large amount of questions. repeat the exercise. do not speak the way they talk about speed. so that the children feel dull. adding to the burden on everyone. Practice h.