Q: What is the negative version of the number 640,665,420?
A: -640,665,420
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:
| 640,665,418 | 640,665,419 | 640,665,421 | 640,665,422 |
| -640,665,418 | -640,665,419 | -640,665,421 | -640,665,422 |