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Example 3-3c Objective Round decimals

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Example 3-3c Vocabulary None

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Lesson 3 Contents Example 1Round Decimals Example 2Round Decimals Example 3Use Rounding to Solve a Problem

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Example 3-1a Round 7.601 to the nearest whole number. Write the problem 1/3 7.601 Determine the digit that is a whole number and draw an arrow to it Look at the number to the right of the whole number If the number is less than 5 then leave the whole number as is If the number is 5 or greater, add 1 to the whole number

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Example 3-1a Round 7.601 to the nearest whole number. 1/3 7.601 If the number is less than 5 then leave the whole number as is If the number is 5 or greater, add 1 to the whole number The 6 is greater than 5 so add 1 to the whole number 7 + 1 = 8 8 Since rounding to nearest whole number, do not put any other place values Answer: 8

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Example 3-1b Round 4.321 to the nearest whole number. Answer: 4 1/3

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Example 3-2a Round 68.94 to the nearest tenth. 2/3 Write the problem 68.94 Determine the digit that is in the tenth place value and draw an arrow to it Look at the number to the right of the whole number If the number is less than 5 then leave the whole number as is If the number is 5 or greater, add 1 to the whole number

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Example 3-2a Round 68.94 to the nearest tenth. 2/3 68.94 If the number is less than 5 then leave the whole number as is If the number is 5 or greater, add 1 to the whole number The 4 is less than 5 so leave the 9 alone 68. Write the digits to the left of the 9 and place the decimal Bring down the 9 68.9 Since rounding to the tenth do not put any digits to the right of the tenth place value Answer: 68.9

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Example 3-2b Round 125.38 to the nearest tenth. Answer: 125.4 2/3

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Example 3-3a EARNINGS In the year 2000, the average hourly wage for a U.S. production worker was $13.75. How much is this to the nearest dollar? 3/3 Write the problem 13.75 Determine the digit that is in the tenth place value and draw an arrow to it Look at the number to the right of the whole number If the number is less than 5 then leave the whole number as is If the number is 5 or greater, add 1 to the whole number

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Example 3-3a EARNINGS In the year 2000, the average hourly wage for a U.S. production worker was $13.75. How much is this to the nearest dollar? 3/3 13.75 If the number is less than 5 then leave the whole number as is If the number is 5 or greater, add 1 to the whole number The 7 is greater than 5 so add 1 to the one’s place value 1 + 3 = 4 Write the digits to the left of the 3 14 Bring down the 4 Since rounding to the nearest dollar do not put any digits to the right of the one’s place value Answer: $14

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Example 3-3a EARNINGS In the year 2000, the average weekly earnings were $474.38. What is this to the nearest dollar? 3/3 Answer: $474

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End of Lesson 3 Assignment Lesson 3:3Rounding Decimals11 - 24 All

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Example 3-3c CEREAL The price per ounce for a box of cereal is shown as $0.1275 on the tag in the grocery store. How much is this to the nearest cent? Answer: $0.13 * 3/3

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