ISBN: 9787535587800 (1 résultats)

paperback. Etat : New. Paperback. Pub Date: December 2012 Pages: 108 Language: Chinese in Publisher: Hunan Education Publishing House every day to do these mouth computational problem. I really do not know what's the use! You often complain! Fact. do Do not look down upon the seemingly simplest mouth computational problem. The port operator. say the result of the operation side of the edge of mental arithmetic. Mouth computational problems is not a dry noise a boring sea. and it contains a number of tips and tricks.…