一、教学要求 1.使学生理解乘法分配律的含义,能够归纳出乘法分配律。 2.培养学生初步的抽象概括能力。二、教学新课 (一)通过实例引出等式,初步感知规律。出示例5: 小强摆小木块,每行摆5个白木块,3个红木块,摆了4行。小强一共摆了多少个木块?(用两种方法解答) First, the teaching requirements 1. To enable students to understand the meaning of multiplication distribution law, can be summed up the law of multiplication distribution. 2. To develop a preliminary abstraction ability of students. Second, teaching a new lesson (a) through examples lead to the equation, the initial perception of the law. Example 5: Xiaoqiang placed small wooden blocks, each row of five white wood blocks, three mahogany blocks, placed in 4 lines. Xiaoqiang put a total number of pieces of wood? (Two ways to answer)