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Which of the following is the nearest to 5.478 times 1080 upon rounding one of the two numbers to either 10, 100, or 1000?
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We want to estimate 5.478 times 1080.
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Our instructions tell us that we only want to round one of the two numbers.
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And we’ll be rounding one of the two numbers to 10, 100, or 1000.
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The first option, 5.478, is not very close to 10, 100, or 1000.
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It would be more sensible to take the number 1080 and round that value down to 1000.
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Now, we would have the problem 5.478 times 1000.
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Multiplying by 1000 means moving the decimal three places to the right.
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One, two, three.
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5.478 times 1000 is equal to 5478.
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And when we go back and look at our answer choices, we find 5478.