With this application you can really learn and understand the subtraction operation.With this applic
看更多 »
With this application you can really learn and understand the subtraction operation.With this applic
看更多 »
一個有趣的教育數學（算術）遊戲原創。************************************************** 這個程序教你百分比。這個程序教你的數學概念 涉及百分比和百分比
看更多 »