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621865

Some people advise that all 5s should be rounded up. That is not correct because it introduced an upward bias. In order to leave the results unbiased while retaining reproducibility of calculations, the statistically appropriate procedure is to round 5s so that the previous digit is (or becomes) even. So 821865 should be rounded down.

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12y ago
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3y ago

620,000

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Q: What is the greatest whole number that rounds to 621860?
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