知识点：Three digit and two digit multiplication
The game is mainly for primary school grade three and four, corresponding the third grade fourth unit of primary school mathematics of Human education--Two digit and two digit multiplication and the fourth grade fourth unit--Three digit and two digit multiplication. Games of QD learn are developed specifically for primary school education, both educative and entertaining.Game design is supported by educational theory.One game one knowledge point.Multi angle interpretation.Repeated practice of different forms of investigation.Play and learn focus.Master difficulty in interest. Proficiency test. QD learn aims at teaching through lively activities and happy learning.