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一、绝对值绝对值的代数意义:正数的绝对值是它的本身,负数的绝对值是它的相反数,零的绝对值仍是零.即
First, the absolute value of the absolute value of the algebraic significance: the absolute value of the positive number is itself, the absolute value of the negative number is its opposite, the absolute value of zero is still zero.