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

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Presentation transcript:

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

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.

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

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

1) 28,4582) 28,9253) 28,512 What digit(s) can help you round to the nearest thousand? Round to the nearest thousand.

1) 28,4582) 28,9253) 28,512 What digit(s) can help you round to the nearest thousand? Round to the nearest thousand. 28,000 29,00029,000 Explain why you think this.

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

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. 18,5308,427 Round up Round down 19,000 +8,000 = 27,000 The total cost is about $27,000. Figure the exact cost. What is the difference? $18,530 + $8,427 The exact cost is $26,957 $27,000 -$26,957 It is a difference of $43.00

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 $ green pepper$ medium onion$ can of tomato sauce$ oz. can of mushrooms$ package of pizza dough $6.99 Estimate!

1 8 oz. Bag of mozzarella cheese $ green pepper$ medium onion$ can of tomato sauce$ oz. Can of mushrooms$ package of pizza dough $6.99 $9.00 $1.00 $0.50 $5.00 $ $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?

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

Estimate the number of bricks used to build this portion of a chimney. * 15 Bricks tall * About 4 bricks long15 x 4 x 2 = 120 bricks * About 2 bricks wideapproximately The end.