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Batz17
Wikipedia says

The additive inverse of a number a is the number that, when added to a, yields zero.

Also known as the opposite, sign change, and negotiation.
TheBlueFox

Step-by-step explanation: The additive inverse tells us that if we add a number and the opposite of that number, the result will be 0.

For example, 642,000 + (-642,000) = 0.