400
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To round 391 to the nearest 100, we look at the digit in the tens place, which is 9. Since 9 is greater than or equal to 5, we round the hundreds place up by 1. Therefore, 391 rounded to the nearest 100 is 400.
Oh, isn't that a happy little number! When we round 391 to the nearest 100, it becomes 400. Just a little adjustment to help that number find its place in the world. Remember, there are no mistakes in rounding, just happy little accidents.
Oh, dude, 391 rounded to the nearest 100 is like... 400. I mean, it's not rocket science, right? Just bump that number up to the nearest century and call it a day. Like, who even needs to know that?
400
100
To round 391 to the nearest ten, we look at the digit in the tens place, which is 9. Since 9 is greater than or equal to 5, we round up. So, 391 rounded to the nearest ten is 400.
100
9000