Find the difference of the smallest 6-digit number and the greatest 5-digit number?

Find the difference of the smallest 6-digit number and the greatest 5-digit number?

Explanation
The smallest 6-digit number is 100000, and the greatest 5-digit number is 99999
To find the difference, subtract the greatest 5-digit number from the smallest 6-digit number:
100000 - 99999 = 1.