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Estimation and Computation

subtracting decimals. Estimation and Computation. teacher notes. There is a worksheet to match this slideshow. This slideshow includes 10 problems from the worksheet. Student whiteboards would also work for this activity. FOR EACH PROBLEM: Have students estimate & record the difference.

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Estimation and Computation

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  1. subtracting decimals Estimation and Computation

  2. teacher notes There is a worksheet to match this slideshow. This slideshow includes 10 problems from the worksheet. Student whiteboards would also work for this activity. FOR EACH PROBLEM: Have students estimate & record the difference. Have them solve the problem. Click to see the solution to the problem so that students can check their estimate.

  3. 76.84 - 21.288 Give a Reasonable Estimate • Less than 20 • Between 20 and 30 • Between 31 and 50 • More than 50

  4. 82.657 - 73.878 Give a Reasonable Estimate • Less than 20 • Between 20 and 30 • Between 31 and 50 • More than 50

  5. 55.421 - 52.631 Give a Reasonable Estimate • Less than 20 • Between 20 and 30 • Between 31 and 50 • More than 50

  6. 58.1 - 14.453 Give a Reasonable Estimate • Less than 20 • Between 20 and 30 • Between 31 and 50 • More than 50

  7. 73.726 - 8.925 Give a Reasonable Estimate • Less than 20 • Between 20 and 30 • Between 31 and 50 • More than 50

  8. 69.215 - 51.355 Give a Reasonable Estimate • Less than 20 • Between 20 and 30 • Between 31 and 50 • More than 50

  9. 93.817 - 55.311 Give a Reasonable Estimate • Less than 20 • Between 20 and 30 • Between 31 and 50 • More than 50

  10. 94.497 - 37.831 Give a Reasonable Estimate • Less than 20 • Between 20 and 30 • Between 31 and 50 • More than 50

  11. 88.519 - 0.523 Give a Reasonable Estimate • Less than 20 • Between 20 and 30 • Between 31 and 50 • More than 50

  12. 69.353- 44.833 Give a Reasonable Estimate • Less than 20 • Between 20 and 30 • Between 31 and 50 • More than 50

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