For this exercise you can round the numbers following these steps:
1. Look at the digit in the Hundreds place.
2. If that digit is less than 5, you only need to remove all the digits to the right of the digit in Thousand place and don't change this digit.
3. If the digit in the Hundreds place is greater than or equal to 5, then you must round up and add 1 to the digit in the Thousands place.
Then, applying the procedure explained above, you get:
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