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Published byClyde Freeman Modified over 7 years ago

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Stacy ran a race in 45.38 seconds. Is this closer to 45 seconds or 46 seconds?

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In this lesson you will learn how to round decimals to the nearest whole number by using a number line.

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Let’s Review = 0.3 = 0.30 equivalent

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rounding $36.87$40.00

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A Common Misunderstanding 0.8 0 1 Not dividing the whole into the correct number of equal parts. 0 1

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Misapplying a rounding “rule” in order to solve a problem. 4.484.55.0 4.484.0

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Core Lesson 3 4 3.4 What is 3.4 rounded to the nearest whole number? Between which two whole numbers is 3.4? 3.4 0.40.6 < = 3.0

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7 8 7.65 What is 7.65 rounded to the nearest whole number? Between which two whole numbers is 7.65? 7.65 0.650.35 > 7.67.607.77.70 = 8.0

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2 3 2.50 What is 2.50 rounded to the nearest whole number? Between which two whole numbers is 2.50? 2.50 0.500.50 = 2.5 The distance between the points is equal! If the distance is equal, the numeral will always round up. = 3.0

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45 46 45.38 Stacy ran a race in 45.38 seconds. Is this closer to 45 seconds or 46 seconds? Between which two whole numbers is 45.38? 45.38 0.380.62 < 45.345.3045.445.40 = 45.0

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In this lesson you have learned how to round decimals to the nearest whole number by using a number line.

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