There are 900 numbers between 100 and 999 inclusive.
To calculate this, we can use a simple subtraction and addition:
- The largest number in the range is 999.
- The smallest number in the range is 100.
Therefore, the number of integers between 100 and 999 inclusive is:
999 - 100 + 1 = 900
The "+ 1" is crucial because we need to include both 100 and 999 in our count. Without it, we'd be counting the number of integers greater than 100 and less than 999.
For example, consider a smaller range: between 1 and 3 inclusive. The numbers are 1, 2, and 3.
- 3 - 1 = 2
- 3 - 1 + 1 = 3
The second calculation gives us the correct answer.
