概念是学好数学的基础。概念教学可从四方面入手:联系生活,引入概念;抽象概括,形成概念;基本训练,巩固概念;拓展延伸,发展概念。只有使学生理解了概念,才能自觉地掌握数学规律,正确地进行判断和推理,灵活地运用知识和技能。 The concept is to learn mathematics. Concept teaching can be started from four aspects: contact life, the introduction of concepts; abstract summary, the formation of concepts; basic training, to consolidate the concept; to expand the extension of the concept of development. Only by enabling students to understand the concept, can we grasp the law of mathematics, judge and reason correctly, and apply the knowledge and skills flexibly.