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数学教学,不仅要使学生对所学的知识做到懂、会、熟,而且要提高学生灵活运用所学的知识解决实际问题的能力。例如,学生在解答五年制小学课本数学第七册第113页第8题时,往往从大面积(长方形面积)中包含了多少个小面积(三角形面积)去思考和解答。对于这道题目,此种解法无疑是正确的。但这种题目在日常生活中却很少出现,为了给学生提供知识应用的更多机会,培养学生独立思考,深入分析的能力,让学生学会把所学过的知识与实际生活现象相联系,在学生练习完这道题目以后,我把题目中长方形的长改成43.4尺,画出裁剪的示意图,让学生直观地看到余下的一部分面积尽管与三角形面积相等,但如果不拼接,却不能裁
Mathematics teaching should not only make students understand, know and be familiar with what they have learned, but also improve the students' ability to apply the learned knowledge to solve practical problems. For example, students often think about how many small areas (triangles) to cover in a large area (the area of a rectangle) when they answer question 8, page 113 of the five-year math book. For this topic, this solution is undoubtedly correct. However, such topics rarely occur in daily life. In order to provide more opportunities for students to apply knowledge and to develop students' ability of independent thinking and in-depth analysis so that students can learn to relate what they have learned to real life phenomena, After the students practiced this topic, I changed the length of the rectangle in the title to 43.4 feet and gave a sketch of the cut so that the students can intuitively see that the remaining part of the area, although not equal to the area of the triangle, can not be spliced Cut