Q: What is the negative version of the number 644,425,215?
A: -644,425,215
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:
| 644,425,213 | 644,425,214 | 644,425,216 | 644,425,217 |
| -644,425,213 | -644,425,214 | -644,425,216 | -644,425,217 |