Section 1.4 Rounding and Estimating 29 Example 1 Solution: 4 3700 3 7 1 This is the digit to the right of the hundreds place. hundreds Because 4 is less than 5, leave the hundreds digit place unchanged. Replace the digits to its right by zeros. 3700 3741 3750 3800 Round down to 3700. Rounding a Whole Number Example 2 Round 1,790,641 to the nearest hundred-thousand. Solution: 1, 7 0, 6 4 1 This is the digit to the right of the given place hundred- value. Because 9 is greater than 5, add 1 to the thousands hundred-thousands place, add: Replace place the digits to the right of the hundred-thousands place by zeros. Rounding a Whole Number Example 3 Round 1503 to the nearest thousand. Solution: 1 0 3 This is the digit to the right of the thousands place. thousands Because this digit is 5, we round up.We increase place the thousands place digit by 1. That is, Replace the digits to its right by zeros. 1 1 2. 5 2000 7 1 8. 9 1,800,000 Answers 3. 12,000 4. 150,000 5. 8,000,000 Rounding a Whole Number Round 3741 to the nearest hundred. Example 1 could also have been solved by drawing a number line. Use the part of a number line between 3700 and 3800 because 3741 lies between these numbers. Skill Practice 3. Round 12,461 to the nearest thousand. Skill Practice 4. Round 147,316 to the nearest ten-thousand. Skill Practice 5. Round 7,521,460 to the nearest million.
miller_prealgebra_2e_ch1_3
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