Estimate Large and Small Quantities Practice

Question

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Question
A total of 7,803,100 tourists visited Country A from the year 2018 to the year 2020. Round to the nearest place value, then express this number in the form of a single digit times an integer power of 10.(1 point)
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Answer 1

To round the number 7,803,100 to the nearest place value, we can look at the digit in the millions place and the digit to its right (hundred thousands) to determine how to round.

The number is: 7,803,100

• The digit in the millions place (7) is followed by 8 in the hundred thousands place. Since 8 is 5 or greater, we round up.
• Therefore, 7,803,100 rounded to the nearest million is 8,000,000.

Next, we want to express 8,000,000 in the form of a single digit times an integer power of 10:

• 8,000,000 can be expressed as \(8 \times 10^6\).

So, the final answer is: 8 × 10^6.