Posted by Shadow on Sunday, August 28, 2011 at 12:39am.
The opposite of a number is its additive inverse. I do not see the term opposite used very frequently in this sense in English, although this is the proper term in French (l'opposé).
For example, the opposite (or additive inverse) of 4 is -4.
You can check the validity by adding the two numbers together. Any number added to its opposite should give zero.
Since 4+(-4)=0, we can safely say that the opposite of 4 is -4.
With the definition above, you should be able to handle the question. Post if you need more information.
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