“百分数”是小学阶段教学的最后一个数概念,教学好这一概念,对发展学生思维、培养数学能力有重要的意义,在教学中要把握好三个阶段:一、直观感知概念数学来源于生活,又服务于生活。小学数学中的许多概念对学生来说并不陌生,对小学生来说,百分数就是有百分号的数。因此在教学中要充分发挥学生的主体性,让学生寻找身边的百分数,学生能找到的百分数有食品包装上标注的营养成分含量、服装标签 “Percentage ” is the last concept of number teaching in elementary school. The concept of teaching well is of great significance in developing students’ thinking and developing mathematics ability. Three stages should be grasped in teaching: First, the concept of intuitive perception Mathematics From life, but also serve life. Many of the concepts in elementary mathematics are not new to students; for elementary students, percentages are percentages. Therefore, teaching students should give full play to the subjectivity, so that students find the percentage around, the percentage of students can find food packaging labeled nutrition content, clothing label