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古人说:尽信书则不如无书。因此,要鼓励学生大胆质疑,敢于提出自己独特的见解。下面就是由学生发现的课本中的一个问题。小学数学(人教版)第九册第3页,课本在安排了例3、例4两个例题之后,有这样一段总结性的话:“当乘数比1小时,积比被乘数小,当乘数比1大时,积比被乘数大。”其实这段话只适合于一般情况,如果考虑到0的特殊性,这段话就不对了。
The ancients said: do not believe in the book is better than no book. Therefore, to encourage students to boldly question, dare to put forward their own unique views. Here's a question in the textbooks discovered by the students. Primary Mathematics (PEP) ninth book page 3, textbooks in the arrangement of Example 3, Example 4 after two examples, there is such a summary of the words: “When the multiplier than 1 hour, the product is smaller than the multiplier, When the multiplier is greater than 1, the product is larger than the multiplicand. ”In fact, the passage is only suitable for the general situation, if we consider the special nature of 0, the passage is wrong.