【教学设想】《数学课程标准》指出:“动手实践、自主探索与合作交流是学生学习数学的重要方式。”北师大版小学数学第七册“乘法分配律”这一内容的安排与旧教材有很大不同,它把这一内容作为一个发现规律的探索活动来进行,要求教师引导学生在活动的过程中发现问题、提出假设、举例验证、建立模型。因此,根据教材编 Teaching Imagination “Mathematics Curriculum Standards” pointed out: “Hands-on practice, independent exploration and cooperation and exchange is an important way for students to learn mathematics.” Beijing Normal University version of the seventh book of mathematics, “the law of multiplication distribution” of the content and the old Textbooks are very different, it is the content as a discovery of the law to explore activities, require teachers to guide students in the process of identifying problems, make assumptions, examples of validation, the establishment of the model. Therefore, according to textbooks