Rounding Whole Numbers

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This slide show has been created by Heather Hoene
at Barrington Elementary School.
Rounding Whole Numbers
And Estimation
Click here to begin the activity.
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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.
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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.
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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.
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What digit(s) can help you round to the nearest
thousand?
1) 28,458 2) 28,925 3) 28,512
Round to the nearest thousand.
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What digit(s) can help you round to the nearest
thousand?
1) 28,458 2) 28,925 3) 28,512
Round to the nearest thousand.
28,000 29,000 29,000
Explain why you think this.
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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.
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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
18,530 8,427
Round up Round down
19,000 8,000 27,000
Figure the exact cost. What is the difference?
The total cost is about 27,000.
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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!
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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 25.00.
Your class will need about
There are different ways you can estimate the
total cost. Did you come up with any other ways?
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Estimate the number of bricks used to build this
portion of a chimney.
Answers will vary!
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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.