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数形结合是中学数学中重要的思想方法之一.数形结合的思想充分运用了数的严谨和形的直观,将抽象的数学语言与直观的图形语言结合起来,使抽象思
The combination of number and shape is one of the important ways of thinking in middle school mathematics.The idea of combination of number and shape makes full use of rigor and intuition of number, integrates abstract mathematical language with intuitive graphical language,