Rounding II

8/12/2019 Rounding II

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3rd Grade

RoundingBy Monica Yuskaitis

California Standard Addressed

1.4 Round off numbers to 10,000to the nearest ten, hundred, and

thousand.

Number

Objectives

To be able to round numbers to the

nearest tenTo be able to round numbers to thenearest hundredTo be able to round numbers to thenearest thousand

VocabularyRound – to replace an exact numberby another that is close to it in valueand easier to use. For example, 52,rounded to the nearest ten is 50.

Use rounding• When the question asks you

to estimate.• When the question asks

“about how many”…? • When an exact answer isn’t

possible.• When an answer is difficult

to obtain.

Memorize this Poem

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

Round this number to the nearestten.

Find your number.

4 7Circle the number in the tens

place.

Look right next door.

4 7Draw an arrow to the right of the

number.

4 or less, just ignore.

4 77 is larger than 4 so go to the

next line of the poem.

5 or more, add 1 more.

4 7Add 1 to the 4.

5 0 After adding 1 to the 4, all the numbers

to the right of the 5 become 0’s.

The Answer

4 7 rounded to the

nearest tens place is5 0

40 5047

Note 47 is closer to 50 on the number line.

Round this number to the nearesthundred.

Find your number.

9 8 6Circle the number in the hundreds

place.

9 8 6Draw an arrow to the right of the

number.

9 8 68 is larger than 4 so go to the

next line of the poem.

9 8 6Add 1 to the 9.

1, 0 0 0 After adding 1 to the 9, all the numbers

to the right of the 10 become 0’s.

The Answer

986 rounded to the

nearest hundreds place is1, 0 0 01,000

900986

Note 986 is closer to 1,000 on the numberline.

Round this number to the nearestthousand.

Find your number.

3 5, 3 2 7Circle the number in the thousands

place.

3 5, 3 2 7Draw an arrow to the right of the

number.

3 5, 3 2 7Since 3 is less than 4 we do not change

the 5.

3 5, 0 0 0 Change the numbers to left of 5 to 0’s.

The Answer

35,327 rounded to the

nearest thousand is3 5, 0 0 035,000 36,00035,327 Note 35,327 is closer to 35,000 on the

number line than to 36,000.

Round these numbers to thenearest ten.

2 8 29 7

2 8 01 0 0

Round these numbers to thenearest hundred.

2, 1 3 9

1 9, 7 4 5

2 8 23, 1 9 7

2, 1 0 0

1 9, 7 0 0

3 0 03, 2 0 0

Round these numbers to thenearest thousand.

2, 8 3 9

1 9, 4 4 5

8, 9 8 24 3,1 9 7

3, 0 0 0

1 9, 0 0 0

9, 0 0 04 3, 0 0 0

CreditsIllustrations from:

Clipart from ClickArt 125,000 DeluxeImage Pak, T/Maker Co., BroderbundSoftware, Inc.

Rounding II

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