Oh, dude, the additive inverse of -12 is just 12. It's like the positive version of that negative number, you know? So if you owe someone -12 dollars, just give them 12 bucks and call it even. Easy peasy lemon squeezy.
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The additive inverse of 18 is -18. The additive inverse of any number is the opposite of that number, such that the sum of the original number and the additive inverse is zero.
The additive inverse of x is -(x), so the additive inverse of -45 is -(-45), or 45.
-1 is the additive inverse of 1.
-5
-35 The additive inverse of a number is the number that will equal 0 when added to the original number so the additive inverse of 3 is -3 the additive inverse of 782 is -782 etc.