34 Chapter 1 Whole Numbers Example 4 Solution: 6 25,000 1 2 4, 9 1 This value is greater than 5. Therefore, add 1 to the hundreds place digit. Replace the digits to the right of the hundreds place with 0. 2. Estimation We use the process of rounding to estimate the result of numerical calculations. For example, to estimate the following sum, we can round each addend to the nearest ten. 31 rounds to 30 12 rounds to 10 49 rounds to 50 The estimated sum is 90 (the actual sum is 92). Estimating a Sum Example 5 Estimate the sum by rounding to the nearest thousand. Solution: 6109 976 4842 11,619 6,109 rounds to 90 1 6,000 976 rounds to 1,000 4,842 rounds to 5,000 11,619 rounds to 12,000 24,000 The estimated sum is 24,000 (the actual sum is 23,546). Estimating a Difference Example 6 Estimate the difference 4817 2106 by rounding each number to the nearest hundred. Solution: 4817 rounds to 4800 2106 rounds to 2100 2700 The estimated difference is 2700 (the actual difference is 2711). Answers 6. 40,000 7. 10,300 8. 13,000,000 Rounding a Whole Number Round the number 24,961 to the hundreds place. Skill Practice 6. Round 39,823 to the nearest thousand. Skill Practice Estimate the sum by rounding each number to the nearest hundred. 7. 3162 4931 2206 Skill Practice Estimate the difference by rounding each number to the nearest million. 8. 35,264,000 21,906,210
miller_basic_college_math_3e_ch1_3
To see the actual publication please follow the link above