Q: What is the negative version of the number 221,664,309?
A: -221,664,309
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:
| 221,664,307 | 221,664,308 | 221,664,310 | 221,664,311 |
| -221,664,307 | -221,664,308 | -221,664,310 | -221,664,311 |