To round the number 31.142857 to the nearest hundred, follow these steps:
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Identify the place value to round: We are rounding to the nearest hundred, and in our case, the number 31.142857 is less than 100.
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Find the closest hundreds: The closest whole hundreds to 31.142857 are 0 and 100.
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Determine the midpoint: The midpoint between 0 and 100 is 50. If the number is less than 50, we round down to 0. If it's 50 or more, we round up to 100.
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Compare the number with the midpoint: Since 31.142857 is less than 50, we round it down.
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Result: Thus, when rounding 31.142857 to the nearest hundred, the result is 0.