The nearest hundred to 2679 is up, but rounded down they are 2600 and 200.
To the nearest hundred 24 rounds down to 0.
800
0
5300
The nearest hundred above 55 is 100. The nearest hundred below 55 is 0.
You round it down to 100, as the 2 for tens must be rounded down.
To the nearest hundred, 520 rounds down to 500.
To the nearest hundred 24 rounds down to 0.
600
8 rounded to the nearest hundred is "zero".
800
Rounded to the nearest 100, 3009 woulkd be rounded down to 3000.
It is 3000 rounded UP to the nearest thousand. It is 2600 rounded down to the nearest hundred. It is 2650 rounded UP to the nearest ten.
0
5300
To the nearest hundred thousand the number would be rounded down to zero. To the nearest hundred thousandth, which you may have meant, 3.00409 is the answer.
500