Hello!
998 rounded to the nearest 10 is 1000. It is also 1000 when rounded to the nearest 100.
274 rounded to the nearest 10 is 270. 274 rounded to the nearest 100 turns it into 300.
533 to the nearest 10 is 530. It is 500 when rounded to the nearest 100.
I hope this helps you!
- Mal