Answer:
To round a number to the nearest hundred thousand, we need to look at the digit in the ten thousand place. If it is 5 or more, we round up the digit in the hundred thousand place by one and make the rest of the digits zero. If it is 4 or less, we keep the digit in the hundred thousand place as it is and make the rest of the digits zero. For example, 123,456 rounds to 100,000 because the digit in the ten thousand place is 4, which is less than 5. 156,789 rounds to 200,000 because the digit in the ten thousand place is 6, which is more than 5.
Therefore, the numbers that round to 100,000 when rounded to the nearest hundred thousand are those that have a digit between 0 and 4 in the ten thousand place, and any digits in the lower places. Some examples are:
100,000
100,001
100,999
101,234
104,567
105,000
These are not all the possible numbers that round to 100,000, but they are some of them. You can use one of the online rounding calculators that I found for you to check other numbers and their rounded values. I hope this helps you understand how to round numbers to the nearest hundred thousand.