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小学数学课本在每个章节之后,都附有一道思考题,这是供学有余力的学生使用的。正确、合理地使用这部分教材,对培养拔尖的数学人材是有其重要意义的。这类题,一般都有规律可循,教学时,不能简单从事,要引导学生观察其特征,逐步列举,逐步探索,以至发现规律,总结规律。让学生在观察探索、归纳总结的过程中,智力、能力得到相应的发展。下面仅以一题为例,谈谈我们的做法。五年制教材第七册,在“小数加减法”之后,有这样一道思考题:一个物体从高空下落,经过4秒钟落地。已知第一秒钟的距离是4.9米,以后每一秒钟下落的距离
Primary Mathematics Textbooks After each chapter, there is a thought-provoking question for students who have spare capacity. Correct and reasonable use of this part of the textbook is of great significance to the training of top-notch math talents. Such questions usually follow the rules. When teaching, they can not simply engage in teaching. Students should be guided to observe their characteristics and gradually enumerate them so that they can discover laws and sum up their laws. Allow students to observe and explore, summarize the process, intelligence, ability to be the appropriate development. The following is only one example, to talk about our approach. Five-year teaching of the seventh book, after the “decimal addition and subtraction”, there is such a question of thinking: an object from high altitude, landing after 4 seconds. It is known that the distance of the first second is 4.9 meters and the distance of falling every second thereafter