Final answer:
The largest whole number that rounds to 900 when rounded to the nearest ten is 900 itself.
Step-by-step explanation:
To determine the largest whole number that rounds to 900 when rounded to the nearest ten, we need to find the highest number that is closer to 900 than any other whole number.
When rounding to the nearest ten, if a number is 5 or greater in the ones place, we round up to the next ten. If the number is less than 5, we round down to the previous ten.
For the number 900, the tens digit is already 0, so any whole number that ends in 0, like 890 or 900 itself, will round to 900 when rounded to the nearest ten. Therefore, 900 is the largest whole number that rounds to 900 when rounded to the nearest ten.
Learn more about rounding whole numbers to the nearest ten