How many 4-digit numbers are there?
Understand the Problem
The question is asking for the total count of 4-digit numbers, which requires identifying the range of 4-digit numbers and counting them.
Answer
9000
Answer for screen readers
The total number of 4-digit numbers is 9000.
Steps to Solve
- Identify the range of 4-digit numbers
The smallest 4-digit number is 1000 and the largest 4-digit number is 9999.
- Calculate the total number of 4-digit numbers
To find the count of 4-digit numbers, subtract the smallest 4-digit number from the largest 4-digit number and then add 1 to include both endpoints.
$$ 9999 - 1000 + 1 = 9000 $$
The total number of 4-digit numbers is 9000.
More Information
4-digit numbers are those ranging from 1000 to 9999 inclusive.
Tips
A common mistake is to forget to add 1 after subtracting to include both endpoints. Without adding 1, the result would incorrectly count only the numbers between the smallest and largest 4-digit numbers without including them.
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