Rounding II
-
Upload
salama-badawi -
Category
Documents
-
view
227 -
download
1
Transcript of Rounding II
8/12/2019 Rounding II
http://slidepdf.com/reader/full/rounding-ii 1/27
3rd Grade
RoundingBy Monica Yuskaitis
8/12/2019 Rounding II
http://slidepdf.com/reader/full/rounding-ii 2/27
Copyright © 2000 by Monica Yuskaitis
California Standard Addressed
1.4 Round off numbers to 10,000to the nearest ten, hundred, and
thousand.
Number
Sense
Third
Grade
8/12/2019 Rounding II
http://slidepdf.com/reader/full/rounding-ii 3/27
Copyright © 2000 by Monica Yuskaitis
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
8/12/2019 Rounding II
http://slidepdf.com/reader/full/rounding-ii 4/27
Copyright © 2000 by Monica Yuskaitis
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.
8/12/2019 Rounding II
http://slidepdf.com/reader/full/rounding-ii 5/27
Copyright © 2000 by Monica Yuskaitis
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.
8/12/2019 Rounding II
http://slidepdf.com/reader/full/rounding-ii 6/27
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.
8/12/2019 Rounding II
http://slidepdf.com/reader/full/rounding-ii 7/27Copyright © 2000 by Monica Yuskaitis
Round this number to the nearestten.
Find your number.
4 7Circle the number in the tens
place.
8/12/2019 Rounding II
http://slidepdf.com/reader/full/rounding-ii 8/27Copyright © 2000 by Monica Yuskaitis
Round this number to the nearestten.
Look right next door.
4 7Draw an arrow to the right of the
number.
8/12/2019 Rounding II
http://slidepdf.com/reader/full/rounding-ii 9/27Copyright © 2000 by Monica Yuskaitis
Round this number to the nearestten.
4 or less, just ignore.
4 77 is larger than 4 so go to the
next line of the poem.
8/12/2019 Rounding II
http://slidepdf.com/reader/full/rounding-ii 10/27Copyright © 2000 by Monica Yuskaitis
Round this number to the nearestten.
5 or more, add 1 more.
4 7Add 1 to the 4.
+1
8/12/2019 Rounding II
http://slidepdf.com/reader/full/rounding-ii 11/27Copyright © 2000 by Monica Yuskaitis
Round this number to the nearestten.
5 or more, add 1 more.
5 0 After adding 1 to the 4, all the numbers
to the right of the 5 become 0’s.
8/12/2019 Rounding II
http://slidepdf.com/reader/full/rounding-ii 12/27Copyright © 2000 by Monica Yuskaitis
The Answer
4 7 rounded to the
nearest tens place is5 0
40 5047
Note 47 is closer to 50 on the number line.
8/12/2019 Rounding II
http://slidepdf.com/reader/full/rounding-ii 13/27Copyright © 2000 by Monica Yuskaitis
Round this number to the nearesthundred.
Find your number.
9 8 6Circle the number in the hundreds
place.
8/12/2019 Rounding II
http://slidepdf.com/reader/full/rounding-ii 14/27
Copyright © 2000 by Monica Yuskaitis
Round this number to the nearesthundred.
Look right next door.
9 8 6Draw an arrow to the right of the
number.
8/12/2019 Rounding II
http://slidepdf.com/reader/full/rounding-ii 15/27
Copyright © 2000 by Monica Yuskaitis
Round this number to the nearesthundred.
4 or less, just ignore.
9 8 68 is larger than 4 so go to the
next line of the poem.
8/12/2019 Rounding II
http://slidepdf.com/reader/full/rounding-ii 16/27
Copyright © 2000 by Monica Yuskaitis
Round this number to the nearesthundred.
5 or more, add 1 more.
9 8 6Add 1 to the 9.
+1
8/12/2019 Rounding II
http://slidepdf.com/reader/full/rounding-ii 17/27
Copyright © 2000 by Monica Yuskaitis
Round this number to the nearesthundred.
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.
8/12/2019 Rounding II
http://slidepdf.com/reader/full/rounding-ii 18/27
Copyright © 2000 by Monica Yuskaitis
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.
8/12/2019 Rounding II
http://slidepdf.com/reader/full/rounding-ii 19/27
Copyright © 2000 by Monica Yuskaitis
Round this number to the nearestthousand.
Find your number.
3 5, 3 2 7Circle the number in the thousands
place.
8/12/2019 Rounding II
http://slidepdf.com/reader/full/rounding-ii 20/27
Copyright © 2000 by Monica Yuskaitis
Round this number to the nearestthousand.
Look right next door.
3 5, 3 2 7Draw an arrow to the right of the
number.
8/12/2019 Rounding II
http://slidepdf.com/reader/full/rounding-ii 21/27
Copyright © 2000 by Monica Yuskaitis
Round this number to the nearestthousand.
4 or less, just ignore.
3 5, 3 2 7Since 3 is less than 4 we do not change
the 5.
8/12/2019 Rounding II
http://slidepdf.com/reader/full/rounding-ii 22/27
Copyright © 2000 by Monica Yuskaitis
Round this number to the nearestthousand.
4 or less, just ignore.
3 5, 0 0 0 Change the numbers to left of 5 to 0’s.
8/12/2019 Rounding II
http://slidepdf.com/reader/full/rounding-ii 23/27
Copyright © 2000 by Monica Yuskaitis
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.
8/12/2019 Rounding II
http://slidepdf.com/reader/full/rounding-ii 24/27
Copyright © 2000 by Monica Yuskaitis
Round these numbers to thenearest ten.
1 3 9
4 5
2 8 29 7
1 4 0
5 0
2 8 01 0 0
8/12/2019 Rounding II
http://slidepdf.com/reader/full/rounding-ii 25/27
Copyright © 2000 by Monica Yuskaitis
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
8/12/2019 Rounding II
http://slidepdf.com/reader/full/rounding-ii 26/27
Copyright © 2000 by Monica Yuskaitis
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
8/12/2019 Rounding II
http://slidepdf.com/reader/full/rounding-ii 27/27
C ight © 2000 b M i Y k iti
CreditsIllustrations from:
Clipart from ClickArt 125,000 DeluxeImage Pak, T/Maker Co., BroderbundSoftware, Inc.