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文献[1]作者对中小学数学教师的日常写作和教师专业成长的关系有很深的感悟,但文中提到一个解题案例笔者有不同看法,现笔者与各位同仁探讨。该案例谈到对如下问题系列的处理:问题1:一个小数,如果把它的小数部分扩大9倍,就得到8.4,这个小数是多少?问题2:一个小数,如果把它的小数部分扩大4倍,就得到5.4,这个小数是多少?原作者经过观察与尝试,认为问题1仅有3.6满足;问题2仅有5.1和3.6满足,并写成文章发表。
Literature [1] The author of the primary and secondary math teachers daily writing and teacher professional development of the deep sentiment, but the article mentioned a problem-solving case I have different views, now the author and colleagues discuss. The case speaks of a series of questions: Question 1: A decimal that yields 8.4 if its fractional part is expanded by 8. What is the fraction? Question 2: A decimal if its fraction is expanded by 4 Times, you get 5.4, what is the decimal? After the author of the original observation and try to think that only a 3.6 to meet the problem; Question 2 is only 5.1 and 3.6 to meet and write the article published.