The answer depends on the context for opposition: the additive inverses are whole numbers but the multiplicative inverses are not (except in the case of -1 and +1).
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The opposite of an even number is an odd number.
It's opposite is a negative. :P
It would be 0, which is also its opposite.
The number opposite -8.3 on the number line is 8.3. In mathematical terms, the opposite of a number is its additive inverse, which means that when you add a number and its opposite, you get zero. Therefore, -8.3 and 8.3 are opposites of each other.
For each positive number, there is a negative number that is its opposite. We write the opposite of a positive number with a negative or minus sign in front.The opposite of a number is also called its additive inverse.For example, 5 is the additive inverse of -5 and -5 is the additive inverse of 5.