Q: What is the negative version of the number 640,521,440?
A: -640,521,440
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:
| 640,521,438 | 640,521,439 | 640,521,441 | 640,521,442 |
| -640,521,438 | -640,521,439 | -640,521,441 | -640,521,442 |