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非负数是指正数或零.初中数学中,常见的非负数有三种:(1)实数的绝对值;(2)实数的偶次幂;(3)非负数的算术平方根.非负数除了具有非负性以外,还有三条常用的性质:(1)最小的非负数是零,没有最大的非负数.(2)有限个非负数的和,仍为非负数.(3)若有限个非负数的和为零,则其中每一个非负数都为零.
Non-negative numbers refer to positive numbers or zeros. In junior high school mathematics, there are three kinds of non-negative numbers: (1) the absolute value of the real number; (2) the even power of the real number; (3) the arithmetic square root of the non-negative number. Beyond the negative, there are three common properties: (1) The smallest non-negative number is zero, and there is no maximum non-negative number. (2) The sum of a finite number of non-negative numbers is still non-negative. (3) If a finite number of non-negative numbers The sum is zero, then each non-negative number is zero.