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非负数是一个比较重要的概念,它有着广泛的应用.在初中教材中对概念是没有明确的规定,许多学生对绝对值、算术平方根,实数的偶次幂等涉及到非负数的概念十分模糊,更不能自觉地运用非负数的概念及性质来解决问题,并常常出现逻辑上的错误。特别是初中阶段数学老师有必要加强对非负数的教学。所谓非负数,在实数范围内是指零和正实数.非负数的性质在解题中颇有用处.常见的非负数有三种:实数的
Non-negative number is a more important concept, it has a wide range of applications in the junior high school textbooks on the concept is not clearly defined, many students absolute value, arithmetic square root, even number of real numbers and other non-negative concept is very vague , But also can not consciously use the concept and nature of non-negative numbers to solve the problem, and often a logical error. In particular, junior high school mathematics teachers need to strengthen non-negative teaching. The so-called non-negative number, in the real number range refers to the zero and the positive real number. The non-negative nature of the problem is quite useful in the problem. There are three common non-negative: real