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在一次作业中,有一道习题全班60位同学居然有48位做错。这道题是“:有一个整数,把它精确到万位后是10万,那么这个数最大是()。”学生的主要错误答案是99999。既然有这么多学生出错,这道题自然成为讲评时的重点,我要不仅让学生知道错了,而且弄清楚为什么错,这样才能真正掌握,举一反三。一、情理之中师:这道题目你是怎么填的?生:99999。生:104999。生:109999。师:你认为哪个答案是正确的?请把你的想法与同伴交流。(生交流,然后反馈)
In a homework, there is a workout class 60 students actually have 48 mistakes. This question is “: There is an integer, it is accurate to the tens of thousands of million, then the maximum number is (). ” The main error of the student’s answer is 99999. Since there are so many students who make mistakes, this question naturally becomes the focus of our assessment. I will not only let the students know the wrong thing, but also make clear why the mistake is so that we can really grasp and give top priority. First, the reason of division: how do you fill in this topic? Health: 99999. Health: 104999. Students: 109999. Teacher: Which one do you think is correct? Please share your thoughts with your peers. (Students exchange, then feedback)