1. Estimation Rounding Whole Numbers Click here to begin the activity.
This slide show has been created by Heather Hoene at Barrington Elementary School.
Rounding Whole Numbers
And
Estimation
Click here to begin the activity.

2. These activities will address the following
Hazelwood Objectives for fifth grade.
Explain math concepts and problem
solutions orally and in writing.
Understand concept of rounding whole
numbers and estimation.
Apply problem-solving strategies to
real-world problems.

3. Directions Whenever you see this picture, you will
need to write the answer in your journal.
Click here to go back to the previous slide.

4. 68,000 The population of the Sioux Reservation was 68,242.
69,000
68,000
The population of the Sioux Reservation was 68,242.
To the nearest thousand, what was the population?
68,000
Explain why you think this.
68,242 is between 68,000 and 69,000,
but it is closer to 68,000.

5. What digit(s) can help you round to the nearest thousand?
1) 28, ) 28, ) 28,512
Round to the nearest thousand.

6. What digit(s) can help you round to the nearest thousand?
1) 28, ) 28, ) 28,512
Round to the nearest thousand.
28, , ,000
Explain why you think this.

7. Round 73,852 to the nearest
70,000
74,000
73,900
73,850
1. Ten-thousand.
2. Thousand.
3. Hundred.
4. Ten.
Explain why you think this.

8. The Smith family wants to buy a truck that costs
$18,530 and camping trailer that costs $8,427.
Estimate the total cost of the truck and the
camping trailer.
$18,530
+ $8,427
The exact cost is $26,957
$27,000
-$26,957
It is a difference of $43.00
18, ,427
Round up Round down
19, ,000 = 27,000
Figure the exact cost.
What is the difference?
The total cost is about $27,000.

9. 1 8 oz. bag of mozzarella cheese $8.57 1 green pepper $0.96
Your class is planning on making a pizza. Below is a list of everything you will need to buy. About how much money does your class need to bring to the store?
1 8 oz. bag of mozzarella cheese $8.57
1 green pepper $0.96
1 medium onion $0.33
1 can of tomato sauce $4.78
1 2 oz. can of mushrooms $2.33
1 package of pizza dough $6.99
Estimate!

10. *There are different ways you can estimate the total
1 8 oz. Bag of mozzarella cheese $8.57
1 green pepper $0.96
1 medium onion $0.33
1 can of tomato sauce $4.78
1 2 oz. Can of mushrooms $2.33
1 package of pizza dough $6.99
$9.00
$1.00
$0.50
$5.00
$2.50
+ $7.00 $
Your class will need about
*There are different ways you can estimate the total
cost. Did you come up with any other ways?

11. bricks used to build this portion of a chimney.
Estimate the number of
bricks used to build this
portion of a chimney.
Answers will vary!

12. bricks used to build this portion of a chimney.
Estimate the number of
bricks used to build this
portion of a chimney.
* 15 Bricks tall
* About 4 bricks long 15 x 4 x 2 = 120 bricks
* About 2 bricks wide approximately
The end.