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六年制小学数学第九册“小数乘法”是以“小数乘以整数、整数乘以小数,小数乘以小数”三部分六个例题编排的,教学的关键是对小数点的处理。这部分内容系统性强,自身知识发展有着共性(既对小数点的处理),还与旧知识整数乘法的计算方法、小数点的移动规律、商不变性质等有着密切的联系。只要发掘学生的潜力,让其大胆探索,不难找出规律来。因此,我进行了重组教材的尝试,将六个例题合并在一节课里,采用“同种并教”的方法进行教学,收到了较好的效果。具体做法是:
Sixth grade primary school mathematics ninth “decimal multiplication ” is based on “decimal multiplied by integer, integer multiplied by decimal, decimal multiplied by decimal ” three parts six examples, teaching is the key to the treatment of decimal point . This part of the content is systematic and has its own common development of knowledge (dealing with the decimal point). It is also closely related to the calculation method of integer multiplication of old knowledge, the law of the movement of the decimal point, and the invariable nature of the quotient. As long as the potential of students to explore, let them bold exploration, it is not hard to find out the law. Therefore, I conducted an attempt to reorganize the teaching materials, and combined the six examples in a single lesson. The teaching method of “same kind and teaching” was adopted and received good results. The specific approach is: