数学家华罗庚说:“数缺形时少直观,形缺数时难入微。”数形结合思想就是通过数形的对应关系来研究问题的思想。应用数形结合思想,能认识问题的本质,提高解题能力。数形结合思想的应用主要有三种类型:以数助形,以形助数,数形互助。 Hua Luogeng, a mathematician, said: “When the number of missing shape is less intuitive, it is harder to shape the missing number.” The idea of ​​combining numbers and shapes is to study the problem through the correspondence between the numbers. Applying the idea of ​​combining number with form can recognize the essence of the problem and improve the ability to solve problems. There are three main types of application of the idea of ​​combination of numbers: a few to help shape, to form aids, the number of mutual assistance.