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一四则运算的—种检验方法华东师范大学数学系教学法教研组中的同志们,学习中央人民政府教育部编订的中学教学大纲草案,学到大纲中说明部分算术那一节时,发现其中的一段话: “在学习整除的特徵时,最好使学生会用棄法来检验演算的结果。”於是教研组中的同志们大家便互相问道:“什么是棄法呢?”因为大纲中没有指明弃九法的内容以及这方面的参考资料,作者也不敢肯定指的到底是那一种方法。不过作者联想到算术中有—种检验四则计算结果的方法,这种方法是和一个数被9这个数
One-four-computational-type test method Comrades in the Teaching Methodology and Research Group of the Department of Mathematics of East China Normal University studied the draft secondary school teaching syllabus compiled by the Ministry of Education of the Central People’s Government. When they learned the grammar section of the outline, they found that A passage says: “When learning the characteristics of integrality, it is best to have the students use discards to test the results of the calculations.” So all the comrades in the teaching and research group asked each other: “What is the law?” because there is no indication in the outline Regarding the content of the nine laws that were abandoned and the reference materials in this area, the author is not sure which method is the one in the end. However, the author thinks that there is a way to test the results of four calculations in arithmetic. This method is to count a number by 9