Q: What is the negative version of the number 643,561,259?
A: -643,561,259
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:
| 643,561,257 | 643,561,258 | 643,561,260 | 643,561,261 |
| -643,561,257 | -643,561,258 | -643,561,260 | -643,561,261 |