1. 3rd Grade Rounding
By Monica Yuskaitis

2. California Standard Addressed
Number
Sense
Third
Grade
1.4 Round off numbers to 10,000
to the nearest ten, hundred, and
thousand.
Copyright © 2000 by Monica Yuskaitis

3. Copyright © 2000 by Monica Yuskaitis
Objectives
To be able to round numbers to the nearest ten
To be able to round numbers to the nearest hundred
To be able to round numbers to the nearest thousand
Copyright © 2000 by Monica Yuskaitis

4. 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

5. 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.
Copyright © 2000 by Monica Yuskaitis

6. 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

7. Round this number to the nearest ten.
Find your number.
4 7
Circle the number in the tens
place.
Copyright © 2000 by Monica Yuskaitis

8. Round this number to the nearest ten.
Look right next door.
4 7
Draw an arrow to the right of the
number.
Copyright © 2000 by Monica Yuskaitis

9. Round this number to the nearest ten.
4 or less, just ignore.
4 7
7 is larger than 4 so go to the
next line of the poem.
Copyright © 2000 by Monica Yuskaitis

10. Round this number to the nearest ten.
5 or more, add 1 more. +1
4 7
Add 1 to the 4.
Copyright © 2000 by Monica Yuskaitis

11. Round this number to the nearest ten.
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.
Copyright © 2000 by Monica Yuskaitis

12. 4 7 rounded to the nearest tens place is
The Answer
4 7 rounded to the nearest tens place is
5 0 47 50 40
Note 47 is closer to 50 on the number line.
Copyright © 2000 by Monica Yuskaitis

13. Round this number to the nearest hundred.
Find your number.
9 8 6
Circle the number in the hundreds
place.
Copyright © 2000 by Monica Yuskaitis

14. Round this number to the nearest hundred.
Look right next door.
9 8 6
Draw an arrow to the right of the
number.
Copyright © 2000 by Monica Yuskaitis

15. Round this number to the nearest hundred.
4 or less, just ignore.
9 8 6
8 is larger than 4 so go to the
next line of the poem.
Copyright © 2000 by Monica Yuskaitis

16. Round this number to the nearest hundred.
5 or more, add 1 more. +1
9 8 6
Add 1 to the 9.
Copyright © 2000 by Monica Yuskaitis

17. 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

18. 986 rounded to the nearest hundreds place is
The Answer
986 rounded to the nearest hundreds place is
1, 0 0 0
900
986
1,000
Note 986 is closer to 1,000 on the number line.
Copyright © 2000 by Monica Yuskaitis

19. 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

20. 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

21. 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

22. 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

23. 3 5, 0 0 0 35,327 rounded to the nearest thousand is The Answer 35,000
36,000
Note 35,327 is closer to 35,000 on the number line than to 36,000.
Copyright © 2000 by Monica Yuskaitis

24. Round these numbers to the nearest ten.
1 3 9
4 5
2 8 2
9 7
1 4 0
5 0
2 8 0
1 0 0
Copyright © 2000 by Monica Yuskaitis

25. Round these numbers to the nearest hundred.
2, 1 3 9
1 9, 7 4 5
2 8 2
3, 1 9 7
2, 1 0 0
1 9, 7 0 0
3 0 0
3, 2 0 0
Copyright © 2000 by Monica Yuskaitis

26. Round these numbers to the nearest thousand.
2, 8 3 9
1 9, 4 4 5
8, 9 8 2
4 3,1 9 7
3, 0 0 0
1 9, 0 0 0
9, 0 0 0
4 3, 0 0 0
Copyright © 2000 by Monica Yuskaitis

27. 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