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在小学数学教学中,对易混知识,如貌似相同其解法不同、或解法相同而形式及内容各不相同的题目,如果能编成题组进行对比练习,不但能提高学生的分析、鉴别能力、同时可以增强对知识的理解和巩固,久而久之会养成一丝不苟的学习品质,思维得到训练和发展。现举例如下: 1.一词之差的对比练习: (1)修一条20千米的公路,已修1/5千米,还剩多少千米? (2)修一条20千米的公路,已修1/5,还剩多少千米? (3)修一条公路,已修1/5,还剩16千米,这条公路长多少千米? (4)修一条公路,已修1/5千米,还剩16千米,这条公路长多少千米? 引导学生在做题前认真分析,仔细观察,找出各自的异同,并通过解题实践进行对比练习,
In the elementary mathematics teaching, if the mixed knowledge, such as the same seemingly different solution, or the same solution and the form and content of different topics, if can be organized into groups for comparative exercises, not only can improve students’ ability to analyze and identify At the same time, it can enhance the understanding and consolidation of knowledge and develop the meticulous learning quality over time, so that the mind can be trained and developed. Now for example as follows: 1. Comparison of the difference between the word Practice: (1) repair a 20 km of highway, has been repaired 1/5 km, how many km left? (2) repair a 20 km of highway, (1) How many km left? (3) Repair a road, have been repaired 1/5, left 16 km, how many km long this road? (4) repair a road, has been repaired 1 / 5 km, 16 km left, how many kilometers of the road? Lead students to carefully analyze the problem, carefully observe and find out their similarities and differences, and through the practice of problem-solving exercises,