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Published byWilfrid Morton Modified over 8 years ago

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Rounding

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When do you use rounding? When the question asks you to round. When the question asks you to estimate. When the question asks “about how many”…? To find out ABOUT what your answer should be.

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Memorize this Poem Find your number. Look right next door. 4 or less just ignore. 5 or more, add 1 more.

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Round this number to the nearest ten. Find your number. 9 7 8 Circle the number in the tens place.

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Round this number to the nearest ten. Look right next door. 9 7 8 Draw an arrow to the right of the number.

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Round this number to the nearest ten. 4 or less, just ignore. 9 7 8 8 is larger than 4 so go to the next line of the poem.

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Round this number to the nearest ten. 5 or more, add 1 more. 9 7 8 Add 1 to the 7. +1

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Round this number to the nearest ten. 5 or more, add 1 more. 9 8 0 Add 1 to the 7 and all the numbers to the right of the 8 become 0’s.

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The Answer 978 rounded to the nearest ten is 980

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Round this number to the nearest hundred. Find your number. 3 2 7 Circle the number in the hundreds place.

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Round this number to the nearest hundred. Look right next door. 3 2 7 Draw an arrow to the right of the number.

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Round this number to the nearest hundred. 4 or less, just ignore. 3 2 7 Since 2 is less than 4 we do not change the 3.

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Round this number to the nearest hundred. 4 or less, just ignore. 3 0 0 Change the numbers to right of 3 to 0’s.

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The Answer 327 rounded to the nearest hundred is 3 0 0

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Let’s practice

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Round this number to the nearest ten. 564 A. 560B. 500 C. 570 D. 600

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Round this number to the nearest hundred. 1,792 A. 1,700B. 1,790 C. 1,800 D. 2,000

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Round this number to the nearest ten. 406 A. 400B. 500 C. 410 D. 600

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Round this number to the nearest hundred. 714 A. 720B. 710 C. 800 D. 700

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Round this number to the nearest ten. 227 A. 200B. 230 C. 220 D. 300

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Round this number to the nearest hundred. 1,131 A. 1,130B. 100 C. 1,100 D. 1,200

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Round this number to the nearest ten. 911 A. 910B. 920 C. 900 D. 1,000

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Round this number to the nearest hundred. 952 A. 900B. 1,000 C. 950 D. 960

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Round this number to the nearest ten. 797 A. 790B. 700 C. 800 D. 710

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