我在教学四年级上册角的度量时对教材上的一个练习的设置产生了一些想法,现在将它提出来,和各位老师商榷。一、情况简介苏教版四年级上册数学教材第二单元第二课时是关于角的度量的内容。在学习本课之前,学生一般都没有接触过量角器,不 When I measured the grade of the fourth grade in teaching, I came up with some ideas on the setting of an exercise on the textbook. I will now put it forward and discuss it with my teachers. First, the brief introduction Sujiao version of the fourth grade on the second volume of mathematics textbooks Unit II is about the measurement of angle content. Students usually have no contact with protractor until they have studied this lesson, no