Answer:
900
Step-by-step explanation:
The 3-digit natural numbers are all whole numbers from 100 to 999.
There are 999 whole numbers from 1 to 999.
Since from 1 to 99 they are 2-digit numbers, and there are 99 of them, you need to subtract 99 numbers from 999 numbers.
999 - 99 = 900
Answer: 900
