Estimating with Decimals
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Theme: |
Pre-Algebra: Rounding and Estimating
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Grades: |
6 - 8
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Subject: |
Math
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Duration: |
45–60 minute period
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Standards
& Goals: |
New Jersey Core Curriculum Content Standards
4.1.6 B. Numerical Operations
- Recognize the appropriate use of each arithmetic operation in problem situations.
- Construct, use and explain procedures for performing calculations with fractions and decimals with:
- Pencil-and-paper
- Mental math
- Calculator
4.1.6 C. Estimation
- Use a variety of strategies for estimating both quantities and the results of computations.
- Recognize when an estimate is appropriate, and understand the usefulness of an estimate as distinct from an exact answer.
- Determine the reasonableness of an answer by estimating the result of operations.
- Determine whether a given estimate is an overestimate or an underestimate.
Note that standards in this lesson plan are for example only. This lesson can be easily adapted to meet your state's specific standards.
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Objectives: |
Students will:
- Use the methods of rounding and clustering to estimate sums and differences involving decimals.
- Determine the most appropriate method for accurately estimating sums and differences involving decimals.
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