论文部分内容阅读
一、问题的提出“小数点位置移动引起小数大小的变化”是教学中的难点之一,学生对于“右移”、“左移”与扩大、缩小之间的关系易于混淆。这是否与小数点“左移、右移”的内容齐头并进(本文简称为“左、右并进”)的教法有关呢? 有些老师在处理这部分知识时,将小数点“左移”、“右移”的内容,先后分别进行教学(本文简称为“左、右分进”)。
First, the issue put forward “the decimal point position changes caused by the size of the decimal” is one of the difficulties in teaching, students “right shift” and “left shift” and expand, narrow the relationship between the easy to confuse. Is this related to the teaching of “leftward shift and rightward shift” of the decimal point (abbreviated as “leftward and rightward”)? Some teachers, when dealing with this part of the knowledge, shift the decimal point “left” and “rightward ”The content, respectively, for teaching (this article referred to as“ left and right into the ”).