Q: What is the negative version of the number 644,657,240?
A: -644,657,240
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:
| 644,657,238 | 644,657,239 | 644,657,241 | 644,657,242 |
| -644,657,238 | -644,657,239 | -644,657,241 | -644,657,242 |