Q: What is the negative version of the number 644,503,509?
A: -644,503,509
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:
| 644,503,507 | 644,503,508 | 644,503,510 | 644,503,511 |
| -644,503,507 | -644,503,508 | -644,503,510 | -644,503,511 |