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Rounding Objectives To be able to To be able to To be able to thousand To be able to thousand To be able to thousand To be able to round numbers to the nearest ten round numbers to the nearest hundred round numbers to the nearest round numbers to the nearest ten round numbers to the nearest hundred round numbers to the nearest million Copyright © 2000 by Monica Yuskaitis Objectives To be able to round numbers to the nearest tenth To be able to round numbers to the nearest hundredth To be able to round numbers to the nearest millionth Copyright © 2000 by Monica Yuskaitis Vocabulary Round – to replace an exact number by another that is close to it in value and easier to use. For example, 52, rounded to the nearest ten is 50. Copyright © 2000 by Monica Yuskaitis Memorize this Poem Find your number. Look right next door. 4 or less just ignore. 5 or more, add 1 more. Copyright © 2000 by Monica Yuskaitis Round this number to the nearest ten. Find your number. 47 Circle the number in the tens place. Copyright © 2000 by Monica Yuskaitis Round this number to the nearest ten. Look right next door. 47 Draw an arrow to the right of the number. Copyright © 2000 by Monica Yuskaitis Round this number to the nearest ten. 4 or less, just ignore. 47 7 is larger than 4 so go to the next line of the poem. Copyright © 2000 by Monica Yuskaitis Round this number to the nearest ten. 5 or more, add 1 more. +1 47 Add 1 to the 4. Copyright © 2000 by Monica Yuskaitis Round this number to the nearest ten. 5 or more, add 1 more. 50 After adding 1 to the 4, all the numbers to the right of the 5 become 0’s. Copyright © 2000 by Monica Yuskaitis The Answer 4 7 rounded to the nearest tens place is 50 40 47 50 Note 47 is closer to 50 on the number line. Copyright © 2000 by Monica Yuskaitis Round this number to the nearest hundred. Find your number. 986 Circle the number in the hundreds place. Copyright © 2000 by Monica Yuskaitis Round this number to the nearest hundred. Look right next door. 986 Draw an arrow to the right of the number. Copyright © 2000 by Monica Yuskaitis Round this number to the nearest hundred. 4 or less, just ignore. 986 8 is larger than 4 so go to the next line of the poem. Copyright © 2000 by Monica Yuskaitis Round this number to the nearest hundred. 5 or more, add 1 more. +1 986 Add 1 to the 9. Copyright © 2000 by Monica Yuskaitis Round this number to the nearest hundred. 5 or more, add 1 more. 1, 0 0 0 After adding 1 to the 9, all the numbers to the right of the 10 become 0’s. Copyright © 2000 by Monica Yuskaitis The Answer 986 rounded to the nearest hundreds place is 900 1, 0 0 0 986 1,000 Note 986 is closer to 1,000 on the number line. Copyright © 2000 by Monica Yuskaitis Round this number to the nearest thousand. Find your number. 3 5, 3 2 7 Circle the number in the thousands place. Copyright © 2000 by Monica Yuskaitis Round this number to the nearest thousand. Look right next door. 3 5, 3 2 7 Draw an arrow to the right of the number. Copyright © 2000 by Monica Yuskaitis Round this number to the nearest thousand. 4 or less, just ignore. 3 5, 3 2 7 Since 3 is less than 4 we do not change the 5. Copyright © 2000 by Monica Yuskaitis Round this number to the nearest thousand. 4 or less, just ignore. 3 5, 0 0 0 Change the numbers to left of 5 to 0’s. Copyright © 2000 by Monica Yuskaitis The Answer 35,327 rounded to the nearest thousand is 3 5, 0 0 0 35,000 35,327 36,000 Note 35,327 is closer to 35,000 on the number line than to 36,000. Copyright © 2000 by Monica Yuskaitis Round these numbers to the nearest ten. 139 140 45 50 282 280 97 100 Copyright © 2000 by Monica Yuskaitis Round these numbers to the nearest hundred. 2, 1 3 9 2, 1 0 0 1 9, 7 4 5 1 9, 7 0 0 282 300 3, 1 9 7 3, 2 0 0 Copyright © 2000 by Monica Yuskaitis Round these numbers to the nearest thousand. 2, 8 3 9 3, 0 0 0 1 9, 4 4 5 1 9, 0 0 0 8, 9 8 2 9, 0 0 0 4 3,1 9 7 4 3, 0 0 0 Copyright © 2000 by Monica Yuskaitis Credits Illustrations from: Clipart from ClickArt 125,000 Deluxe Image Pak, T/Maker Co., Broderbund Software, Inc. Copyright © 2000 by Monica Yuskaitis