Question

How many four decimal digit positive integers (between 1000 and 9999 inclusive):

Answer 1

There are 9000 four decimal digit positive integers between 1000 and 9999, which is determined by subtracting the smallest number of the range from the largest and adding one.

Step-by-step explanation:

The question asks how many four decimal digit positive integers exist between 1000 and 9999, inclusive. Four decimal digit numbers are integers that range from the smallest 1000 to the largest 9999. Each of these numbers is composed of four digits without any decimal points since they are whole integers.

To find out how many four decimal digit positive integers there are, we can simply subtract the smallest number in this range from the largest and add one. The calculation would be 9999 - 1000 + 1, which equals 9000. Therefore, there are 9000 four decimal digit positive integers between 1000 and 9999.