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Estimation & Rounding Whole Numbers

Estimation & Rounding Whole Numbers. By Martin Skelly Bielefield Elementary Grade 4. Objectives addressed :. Explain math concepts and problem solutions orally and in writing. Understand concepts of rounding whole numbers and estimation.

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Estimation & Rounding Whole Numbers

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  1. Estimation & Rounding Whole Numbers By Martin Skelly Bielefield Elementary Grade 4

  2. Objectives addressed: • Explain math concepts and problem solutions orally and in writing. • Understand concepts of rounding whole numbers and estimation. • Applying problem solving strategies to real-world problems.

  3. Directions • When ever you see this picture, you will need to write the answer in your math journals.

  4. Hundred. Ten 100 120 Round 123 to the nearest Explain why you think this.

  5. Hundred Ten 600 630 Round 627 to the nearest Explain why you think this.

  6. Thousand Hundred Ten 2,000 1,600 1,630 Round 1,627 to the nearest Explain why you think this.

  7. Thousand Hundred Ten 6,000 6,000 5,990 Round 5,986 to the nearest Explain why you think this.

  8. Ten Thousand Thousand Hundred Ten 10,000 11,000 11,500 11,490 Round 11,485 to the nearest Explain why you think this.

  9. Ten Thousand Thousand Hundred Ten 80,000 79,000 78,500 78,500 Round 78,499 to the nearest Explain why you think this.

  10. 1.) 27,485 2.) 26,825 3.) 27,612 What digit(s) can help you round to the nearest thousand? Round to the nearest thousand

  11. 1.) 27,485 2.) 26,825 3.) 27,612 What digit(s) can help you round to the nearest thousand? Round to the nearest thousand 1.) 27,000 2.) 27,000 3.) 28,100 Explain why you think this.

  12. The population of the city of Middletown was 47,438 in the year 2005. To the nearest thousand, what was the population? Explain why you think this. 47,000 47,438 is between 47,000 and 48,000, but it is closer to 47,000. 47,438 48,000 47,000

  13. Mr. Skelly’s class is planning on making pizza. Below is a list of everything you will need to buy. About now much money does your class need to bring to the store? • 1 8 oz. bag of mozzarella cheese $8.47 • 1 medium onion $0.49 • 1 pepperoni stick $1.95 • 1 can of tomato sauce $3.78 • 1 2 oz. can of mushrooms $2.36 • 1 package of pizza dough $6.99 Estimate!

  14. ANSWER: • 1 8 oz. bag of mozzarella cheese $8.47 $8.00 • 1 medium onion $0.49 $0.50 • 1 pepperoni stick $1.95 $2.00 • 1 can of tomato sauce $3.78 $4.00 • 1 2 oz. can of mushrooms $2.46 $2.50 • 1 package of pizza dough $6.99 + $7.00 • Your class will need about $25.00 There are different ways you can estimate the total cost. Did you or can you come up with any other ways?

  15. Estimate the number of jelly beans in the full jar. 10 jelly beans Estimate:____________

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