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在数学例题的教学中,教师经常利用穿针引线、归类比较的方法,把例题引伸、推广,作一些必要的演变,这对开发学生智力、培养其学习能力有重要作用。例题的演变能够让学生多方位、多角度的去比较,去鉴别,从异中求同,从同中求异,使其逻辑思维能力得到培养训练,从而提高他们认识事物的能力。现根据自己多年的教学实践,谈几例具体做法。
In the teaching of mathematics examples, teachers often use needle threading methods to classify and compare examples, and extend and promote examples to make necessary changes. This plays an important role in developing students’ intelligence and cultivating their learning ability. The evolution of examples can enable students to compare, identify, seek differences from differences, and seek differences from the same in a multi-faceted, multi-angle view, so that their logical thinking ability can be cultivated and trained to improve their ability to understand things. Based on his own years of teaching practice, he now discusses a few specific practices.