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81.176

  1. Rounding 81.1763 to three decimals, look at the digit just to the right of 6.
  2. Since the digit is less than 5, do not change the rounding digit which is 6, but drop all digits to the right of it, thus drop 3. Therefore, the answer is 81.176
  3. But just in case that digit is greater than or equal to five, add one to the rounding digit and drop all digits to the right of it.

Example: round 81.1765 to three decimals, the answer is 81.177.

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Q: How do you round 81.1763 to three decimals?
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