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所谓比较,就是指两种或两种以上同类的事物辨别异同或高下,比较是一切理解和思维的基础,它在初中数学教学中有着广泛的应用,比较对于加深知识的理解,打好双基,培养能力有它独到的优势。这是因为: 一、运用正反比较,辨别概念的差异,培养判断力 初中数学的正数与负数、有理数与无理数、方程与不等式、常量与变量等都是呈明显差异对立统一的概念;加法与减法、乘法与除法、乘方与开方、整式乘法与因式分解等都是呈明显对立的运算,对于这些呈明显差异的
The so-called comparison refers to the identification of similarities or differences between two or more of the same kind of things. Comparison is the foundation of all understanding and thinking. It has a wide range of applications in junior mathematics teaching, and it helps to deepen the understanding of knowledge. Base, the ability to cultivate has its unique advantages. This is because: First, use positive and negative comparisons to discriminate the differences in concepts, develop the concepts of positive and negative mathematics, rational numbers and irrational numbers, equations and inequalities, constants and variables, etc. And subtraction, multiplication and division, power and square, integer multiplication, and factorization are clearly opposite operations, and these are obviously different.