Q: What is the negative version of the number 642,278,621?
A: -642,278,621
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:
| 642,278,619 | 642,278,620 | 642,278,622 | 642,278,623 |
| -642,278,619 | -642,278,620 | -642,278,622 | -642,278,623 |