The negative of a number is the number with the sign changed. The negative of 5 is -5. The negative of -3 is --3 = 3. The negative of x is -x. The negative of -x is --x = x. A double negative is the negative of a negative. The double negative of x is --x = x.
A negative number is a number whose value is less than zero. Two examples of negative numbers are -1, -5.5.
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