Q: What is the negative version of the number 21,515,557?
A: -21,515,557
Negative numbers are usually written with - in front of them. They represent a number that is less than zero.
Here are more examples of negative numbers in sequence:
| 21,515,555 | 21,515,556 | 21,515,558 | 21,515,559 |
| -21,515,555 | -21,515,556 | -21,515,558 | -21,515,559 |