“有序思考”是数学思考的重要方式。人教版《数学》二年级上册“数学广角——简单的排列”这一内容,承载着“引导学生进行有序思考”的功能。教学中除了设计操作性的活动(如摆、写、填表等)让学生体验“不重复、不遗漏”的“序”的特征,更要引导学生进行“简约而又结构化”的数学化表征,才能促使学生深刻体会“有序思考”的思维价值。 “Orderly thinking ” is an important way of thinking in mathematics. PEP “Mathematics” grade two volumes “Mathematics wide angle - simple arrangement ” This content, carrying “to guide students to think in an orderly manner” function. In addition to the design of operational activities in teaching (such as pendulum, write, fill in forms, etc.) for students to experience “non-repetitive, do not miss ” “sequence ” characteristics, but also to guide students to conduct “simple but structured Can we help students to deeply understand the thinking value of ”orderly thinking".