Q: What is the negative version of the number 643,643,021?
A: -643,643,021
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:
| 643,643,019 | 643,643,020 | 643,643,022 | 643,643,023 |
| -643,643,019 | -643,643,020 | -643,643,022 | -643,643,023 |