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Estimating and Computing Decimal Subtraction: Classroom Activity Guide

This teacher's guide includes a slideshow and worksheet designed to enhance students' skills in estimating and computing decimal subtraction. Featuring 10 example problems, the slideshow allows students to first estimate the difference and then solve the problems. After attempting each problem, students can check their estimates with the provided solutions. This engaging activity can be done on student whiteboards for interactive learning, encouraging collaboration and practice with decimal operations.

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Estimating and Computing Decimal Subtraction: Classroom Activity Guide

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Presentation Transcript

  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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