一、问题缘起单位换算0.3小时=30分的错误,从开始学习到小学毕业还有部分学生出现。这个错误的出现,是由于学生一时单位进率弄错,还是教师教学不到位,或是教材编排不够合理,还是有其他原因?二、分析错因,调整教学经过仔细研究发现:很多学生把时间单位进率和其他十进制、百进制单位进率相混淆,另外就是部分学生不懂单位换算的方法。针对这种现象,在教学时该怎样处理教材,怎样改进教法,提高学生掌握单位 First, the problem originated from unit conversion 0.3 hours = 30 points error, from the beginning of the study to primary school graduation there are some students. Second, the analysis of the cause of the error, adjust the teaching After careful study found that: many students put the time The unit rate is confused with other decimal and base unit rates, and some students do not understand the unit conversion method. In response to this phenomenon, how to deal with teaching materials in teaching, how to improve teaching methods to improve the students to master units