Smallest 4 digit number is 1111
largest 3 digit number is 999 = 112

Difference between the largest three digit number and the smallest four digit number


The largest three digit number is 999. This is because a three digit number can have a maximum of three digits, and the highest digit is 9. Therefore, the largest three digit number is 999.


The smallest four digit number is 1000. This is because a four digit number must have at least four digits, and the first digit cannot be 0. Therefore, the smallest four digit number is 1000.


To find the difference between the largest three digit number and the smallest four digit number, we need to subtract the smallest four digit number from the largest three digit number.

999 - 1000 = -1

The difference between the largest three digit number and the smallest four digit number is -1. This means that the smallest four digit number is only 1 less than the largest three digit number.

In other words, if we add 1 to the largest three digit number (999), we get the smallest four digit number (1000).

This concept of adding or subtracting 1 to a number to get the next or previous number is important in mathematics and is known as the successor and predecessor of a number.