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乘法分配律的教学难点是引导学生用数学语言归纳乘法分配律。为了突破这个难点,我在教学中注重学生动手操作,把课本例题化静为动,引导学生观察、分析、比较,层层深入地归纳出乘法分配律,让学生经历抽象概括的过程。一、通过学具操作,揭示数量关系 1.让学生拿出20个白色硬纸板方块和12个
The teaching difficulty of multiplication assignment law is to guide students to use mathematical language to generalize the law of multiplication distribution. In order to break through this difficult point, I pay attention to the students' hands-on teaching in teaching. The textbook example is static and dynamic, guiding the students to observe, analyze and compare. The law of multiplication distribution is summed up layer by layer, which enables students to go through the process of abstract summarization. First, through the operation of learning tools to reveal the number of relations 1. Let students come up with 20 white cardboard boxes and 12