Opposites
The opposite of a number is its additive inverse. The sum of a number and its opposite is zero. (This is sometimes called the property of opposites).
a + (–a) = 0
Example:
–999 + 999 = 0
(1/3) + (–1/3) = 0
1 + (–1) = 0
So, the opposite of –999 is 999; the opposite of 1/3 is –1/3; the opposite of 1 is –1.
