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【课前思考】数学运算定律的教学是培养学生推理能力的有效载体。运算定律这个知识点的学习,我们从小学一年级就开始渗透教学,学生在一二三年级积累了大量的数学活动经验。在四年级进行系统的运算定律教学,应该让学生对所有的运算定律有一个整体的感悟,明白它们之间内在的联系,同时让学生亲身经历“提出问题——引发猜想——验证猜想——归纳总结——拓展延伸”的过程。
[Thinking before class] The teaching of mathematical laws of law is an effective carrier to develop students’ reasoning ability. The law of operation This point of knowledge learning, we started from the first year of primary school infiltration teaching, students in the second and third grade accumulated a large number of mathematical activities experience. Systematic teaching of arithmetic in the fourth grade should allow students to have a holistic understanding of all the laws of arithmetic, to understand the intrinsic connections between them, and to expose the students to their own experiences. “Ask Questions - Trigger Conjectures - Prove Conjectures - - Summarize - Extend the extension of ”the process.