Theory:

The opposite of a positive integer is negative.
Example:
1. The opposite of \(5\) is \(-5\).
 
2. The opposite of \(10\) is \(-10\).
The opposite of a negative integer is positive.
Example:
1. The opposite of \(-3\) is \(3\).
 
2. The opposite of \(-24\) is \(24\).
The opposite of the opposite of a number is the number itself.
Example:
1. The opposite of \(-5\) is \(5\) and the opposite of \(5\) is \(-5\).
So, the opposite of the opposite number is the same number \(-5\).
 
2. The opposite of \(10\) is \(-10\) and the opposite of \(-10\) is \(10\).
So, the opposite of the opposite number is the same number \(10\).
The opposite of every positive number is the same number with a negative sign.
Important!
The opposite of \(0\) is \(0\). This is because zero is neither positive nor negative.