Well, isn't that a happy little question! When we round 510 to the nearest 10, we look at the digit in the tens place, which is 1. Since 1 is closer to 0 than 10, we round down to 510. Just imagine that number nestled comfortably in its new rounded home!
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Well, honey, 510 rounded to the nearest 10 is 510. Why? Because it's already sitting pretty on a nice, round number. No need to shake things up just for the sake of it.
To round 510 to the nearest 10, we look at the digit in the tens place, which is 1. Since the digit in the ones place is less than 5, we round down. Therefore, 510 rounded to the nearest 10 is 510.
510
505 rounded to the nearest to is 510
Count in tens. What are the two tens either side of 509? 500 is smaller and 510 is bigger. Any ten smaller than 500 is going to be further away than 500 Any ten bigger than 510 is going to be further away than 510 So the answer is going to be one of 500 and 510. Now, how far is 500? 509 - 500 = 9 units how far is 510? 510 - 509 = 1 unit So which is the smaller distance? 1 unit to 510. So 510 is the nearest 10.
The number is already rounded to the nearest ten.
510 + 2*5 = 510 + 10 = 520