By Zhi-Qiang Cao, Ki Hang Kim, Fred W. Roush

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1 9 Name Class OBJECTIVE 3 Date Round a given whole number. A Round to the indicated place value. 33. 836 (ten) 34. 684 (ten) 35. 1468 (hundred) 36. 3450 (hundred) B Number 37. 38. 39. 40. Ten Hundred Thousand Ten Thousand 607,546 689,377 7,635,753 4,309,498 OBJECTIVE 4 Read tables. A Exercises 41–45. The percent of people who do and do not exercise regularly, broken down by income levels, is shown in the table below (Source: Centers for Disease Control and Prevention). Regular Exercises by Income Level Income $0–$14,999 $15–$24,999 $25–$50,000 Over $50,000 Does Exercise Does Not Exercise 35% 40% 45% 52% 65% 60% 55% 48% 41.

Word names are written words that represent numerals. The word name of 213 is two hundred thirteen. The symbols less than, Ͻ, and greater than, Ͼ, are used to compare two whole numbers that are not equal. So, 11 Ͻ 15, and 21 Ͼ 5. To round a whole number means to give an approximate value. ” A table is a method of displaying data in an array using a horizontal and vertical arrangement to distinguish the type of data. A row of a table is a horizontal line of a table and reads left to right across the page.

87,000 Ϫ38,000 49,000 Round each number to the nearest thousand. The estimated difference is 49,000. Answers to Warm-Ups I. The estimated sum is 2100. J. The estimated difference is 32,000. 2 Adding and Subtracting Whole Numbers K. Petulia subtracts 756 from 8245 and gets a difference of 685. Estimate the difference by rounding to the nearest hundred to see if Petulia is correct. 8200 Ϫ 800 7400 Round each to the nearest hundred. The estimated answer is 7400 so Petulia is not correct. Apparently she did not align the place values correctly.

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