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在初中代数課中,关于开平方这一部分,对于学生来說并不是很容易理解、掌握的。笔者經过考虑与实驗,感到按照以下所选的教材与安排进行教学尚能使学生易于接受,并能达到教学大綱上所規定的要求的。因此願将它写出来供教师同志們参考并希予以指正。当說明目的,引入新課以后,先指出一个具体問題: 例:已知784是一个完全平方数,求它的算术平方根。而后按照以下的順序进行讲解: 解:
In the junior high school algebra class, it is not easy for the students to understand and master the part about opening the square. After considering and experimenting, the author feels that teaching in accordance with the following selected teaching materials and arrangements can still make the students easy to accept and meet the requirements stipulated in the syllabus. Therefore, I would like to write it out for teachers’ comrades to refer to and correct them. For the purpose of explanation, after introducing the new lesson, first point out a specific question: Example: Knowing that 784 is a complete square number, find its arithmetic square root. Then explain in the following order: Solution: