数形结合是课标设计的核心概念之一,它能使比较抽象的概念转化为清晰、具体的事物,学生容易掌握和理解。著名数学家华罗庚先生说:“数缺形时少直觉,形少数时难入徽,数形结合百般好,隔离分家万事休”。因此无论在教师的教和学生的学的过程中,都要有意识地渗透数形结合思想,使计算中的算式形象化,帮助学生在理解算理,提高学生的思维能力。 Combination of numbers is one of the core concepts in the course design, which can make the concept of abstract into a clear, specific things, students can easily grasp and understand. Well-known mathematician Mr. Hua Luogeng said: “The lack of intuition when the number of lack of shape, shaped into the emblem in the minority, the combination of good and bad shape, isolation, everything off.” Therefore, both in the teaching of teachers and students in the process of learning, we must consciously penetrate the number of forms combined with ideas, the calculation formula to visualize, to help students understand the arithmetic, improve students’ thinking ability.