Q: What is the negative version of the number 21,978,990?
A: -21,978,990
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:
| 21,978,988 | 21,978,989 | 21,978,991 | 21,978,992 |
| -21,978,988 | -21,978,989 | -21,978,991 | -21,978,992 |