所谓计算法则,简单地讲是指在计算中所要遵循的方法、规则、过程、顺序或程序,它是用来说明计算过程中所必须遵循的基本逻辑的。计算法则到底应该怎样教?传统的许多经验和做法是非常好的,如教师清晰的讲解、规范的板书、学生足够时间的独立练习,等等。但课程改革背景下计算法则的有效建构,还涉及问题情境和练习等问题,需要教师给予更多的关注。一、融入情境:在直观中建构法则当数学的计算法则以具体情境为背景 The so-called rule of calculation, simply means refers to the method to be followed in the calculation, rules, procedures, procedures or procedures, it is used to illustrate the calculation process must follow the basic logic. What should the law of calculation be taught in the end? Many traditional experiences and practices are very good, such as a clear explanation of teachers, standardized writing, students’ independent practice of sufficient time, and so on. However, the effective construction of the law of calculation in the context of curriculum reform also involves problems, situations and exercises, which require teachers to pay more attention. First, the integration into the situation: Constructing rules in intuition When the mathematical law of mathematics to the specific context as the background