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在小学数学教学中,教师一般都能通过课本中的习题,使学生加深和巩固所学的知识,这对提高教学质量毙疑是十分有益的。但是,停留在这一步是不够的。应该注意到,课本中有不少习题除具有上述作用外,还起着为学生今后学习新知识打下伏笔的作用。比如,编者为了分散难点,往往在配合前面教学内容的练习题中,配备了一些为后面学习新知识作准备的练习题。如果教师能重视这部分练习题的承前启后作用,可以得到更好的教学效果。 本文试就小学数学第八册前五个练习中编者安排的为“列方程解应用题”这节教材作准备的习题,谈谈如何发挥这类习题的承前启后作用。
In elementary mathematics teaching, teachers can generally make the students deepen and consolidate what they have learned through textbook exercises, which is very helpful to improve the quality of teaching. However, staying at this step is not enough. It should be noted that in addition to the above-mentioned functions, many exercises in textbooks also play a role in helping students learn new knowledge in the future. For example, editors in order to disperse the difficulties, often with the previous teaching content exercises, equipped with some for the back to learn new knowledge to prepare exercises. If teachers can attach importance to this part of the exercises the role of predecessor, you can get better teaching results. This paper tries to prepare for the teaching materials of “Column Equation Solution Application” arranged by the editors of the first five exercises in the eighth volume of primary school mathematics, and talk about how to exert the function of such exercises.