读了2014年9期《中小学数学》(小学版)的《关于“时刻”与“时段”的思考》,从中看出“时刻”和“时段”不仅性质不同,单位也不同,细细看来,它们应该是不同的数学概念,两个不同的概念采用一套计量单位,就让学生感到困惑。黄老师强调描述“时刻”坐标关键在于练习,掌握“时长”关键在于理解。我觉得不管是练习还是理解,首先需要用法上的统一规定。什么时候用“小时”?什么时候用“时”?在用法上是否有统一的规定?从上面释义的举例中已清楚地看出:表示经过的时段一般用“小时”表示,表示某 Read the “about” moments of “elementary and junior high school mathematics” (elementary school edition) in 2014 and think of “time” and “period of time” The units are also different. At the slightest, they should be different mathematical concepts. Two different concepts adopt a unit of measurement that confuses the students. Huang stressed that the key to “time ” coordinates is to practice, to grasp “duration ” The key is to understand. I think whether it is practice or understanding, first of all need to use the uniform provisions. When is the use of “hour ”? When is “” used? Is there a uniform usage? From the above example, it is clear that the passage of time is generally expressed in “hours” Said that a