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数形结合思想是一种可使复杂问题简单化、抽象问题具体化的常用的数学思想方法。要想提高学生运用数形结合思想的能力,需要教师引导学生学会联系数形结合思想、理解数形结合思想、运用数形结合思想、掌握数形结合思想。如何从具体问题中将数形结合思想渗透得厚些、深些、宽些、浓些呢?现结合教学实际谈谈自己的一些看法。一、数形结合,应深度揭示【案例1】在教学《钉子板上的多边形》一课时,学生对四种图形进行分析比较,初步得出规律
The combination of number and shape is a commonly used method of mathematics that can simplify complex problems and abstract problems. In order to improve students’ abilities to use the combination of number and shape, teachers should be guided to learn how to combine number with shape, to understand combination with number, to combine number with shape and to grasp combination of number and shape. How to penetrate the number-shape combination thoughts from concrete problems is thicker, deeper, wider and more concentrated? Now we can talk about some of our own opinions based on the actual teaching practice. First, the combination of a few figures, should be revealed in depth [Case 1] In the teaching of “polygon on the nail plate,” a class, the students analyze and compare the four graphics, the initial law