Question

Round off to the nearest hundred, what numbers can be estimated as $900$.

Answer 1

Estimation to nearest $100$:

To round off to the nearest $100$, look at the digits in tens place. If it is less than $5$, round down. If it is $5$ or more, round up.

So, numbers from $850$ to $899$ having the tens digit greater than or equal to $5$ are rounded up to $900$ and numbers from $900$ to $949$ having tens digit less than $5$ are rounded down to $900$.

Thus, numbers that could be estimated as $900$ are $850$ to $949$.