1. Rounding of Numbers Up to Hundred Millions
July 2, 2012

2. Round off numbers to the nearest place value.
Objectives
Round off numbers to the nearest place value.

3. For example, 52, rounded to the nearest ten is 50.
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.

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

5. Round this number to the nearest ten.
Find your number.
8 , 6 4 7
Circle the number in the tens place.

6. Round this number to the nearest ten.
Look right next door.
8 , 6 4 7
Draw an arrow to the right of the number.

7. Round this number to the nearest ten.
4 or less, just ignore.
8 , 6 4 7
7 is larger than 4 so go to the
next line of the poem.

8. Round this number to the nearest ten.
5 or more, add 1 more +1
8 , 6 4 7
Add 1 to the 4

9. Round this number to the nearest ten.
5 or more, add 1 more
8 , 6 5 0
After adding 1 to the 4, all the number to the right of the 5 become 0’s

10. 8,647 rounded to the nearest tens place is
The Answer
8,647 rounded to the nearest tens place is
8,650
8,640
8,647
8,650
Note 8,647 is closer to 8,650 on the number line.

11. Round this number to the nearest hundred.
Find your number.
8 , 6 4 7
Circle the number in the tens place.

12. Round this number to the nearest hundred.
Look right next door.
8 , 6 4 7
Draw an arrow to the right of the number.

13. Round this number to the nearest ten.
4 or less, just ignore.
8 , 6 4 7
Since the number is 4 we do not change the 6

14. Round this number to the nearest ten.
4 or less, just ignore.
8 , 6 0 0
Change the number to the left of 6 to 0’s.

15. 8,647 rounded to the nearest hundred place is
The Answer
8,647 rounded to the nearest hundred place is
8,600
8,600
8,700
8,647
Note 8,647 is closer to 8,600 on the number line.

16. 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

17. 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

18. 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

19. Round these numbers to the nearest ten thousand.
2 2, 8 3 9
3 1 9, 4 4 5
4 8, 9 8 2
1 4 3,1 9 7
2 0, 0 0 0
3 2 0, 0 0 0
5 0, 0 0 0
1 4 0, 0 0 0

20. Round these numbers to the nearest million.
2 2, 8 3 9, 231
3 1 9, 4 4 5, 012
4 8, 9 8 2, 376
1 4 3,1 9 7, 212
23,000, 000
319,000,000
49,000,000
143,000,000