Posted by **Shadow** on Sunday, August 28, 2011 at 12:39am.

Could anyone explain to be what these term mean in math? I try googling them but can't find the answer. Thanks

1.Opposite of a Difference

2.Opposite of a Sum

3.Opposite of an Opposite

- Math -
**MathMate**, Sunday, August 28, 2011 at 9:19am
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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