0

Treat it like any other number. I understand its confusing but that's the intent. When rounding to nearest hundred If the last two digits are 49 or less replace it with 00. If 50 or above replace with 00 and add 100.

Otherwise the math purpose for rounding (simplicity and averages) wouldn't work.

They want her to think about why, which makes it confusing for us that are use to this being a simple problem.