计算教学具有抽象性,而小学生的思维是以具体形象为主。如何解决计算教学的高度抽象性与小学生思维的具体形象性之间的矛盾,让学生在充满现实性、趣味性和挑战性的问题情境中发现和提出数学问题,进而理解算理,掌握算法呢?笔者认为,将计算教学寓于具体问题情境之中是计算教学的应然追求,创设计算教学有效问题情境要凸显“三性”。1.情境创设要凸显现实性,让学生想探究。数学源于生活高于生活,数学问题情境创设越接 Computational teaching is abstract, while primary school students' thinking is based on specific images. How to solve the contradiction between the high abstraction of computational teaching and the concrete image of pupils' thinking so that students can find and put forward mathematical problems in realistic, interesting and challenging problem situations so that they can understand algorithms and master algorithms In the author's opinion, teaching calculation should lie in the concrete problem situation, which should be the pursuit of calculation teaching. The situation of creating effective calculation teaching should be highlighted. 1. Situational creation should highlight the reality, so that students want to explore. Mathematics derived from life higher than life, mathematics problems create the more context