Mathematics Curriculum Guide
Estimation and Computation
Grade 7 In the Area of: Estimation & Computation |
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| 1
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| Estimate to determine numbers.
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Discuss reasonableness of facts and answers. Do Activity 4,
p. 19. Have students bring in news clippings to evaluate.
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Justify reasonableness of answers to various problems.
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Sara placed one number on each side of 2 disks. She said that
if she flipped the disks and added the 2 numbers factoring up, the sum was always one of
the following numbers: 1, .23, .87, .1. What numbers could Sara have placed on each face
of the 2 disks? Share reasoning.
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"Developing Number Sense," Addenda Series, pp. 19-21. | ||
Grade 7 In the Area of: Estimation & Computation |
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| 2
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| Validate solutions using estimating.
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Distribute Activity 15, p. 28 and ask students to identify
number of digits in answer and explain thinking.
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Estimate the size of an answer and explain their thinking. | Developing Number Sense, p. 28.
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Grade 7 In the Area of: Estimation & Computation |
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| 3
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| Use fractions, decimals & percents
in making estimates.
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Give students a copy of circles shown on p. 29 and explain
the activity.
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Cut out circles and put them together as shown. Answer the
questions in the activity.
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Developing Number Sense, p. 29.
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Grade 7 In the Area of: Estimation & Computation |
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| 4
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| Use estimation to select most appropriate solutions. | Distribute copy of Activity 1, "How Good is Your Estimate," 20 cm. rules and meter sticks. Also copies of Activities 1-6 for group work. | Estimate and then measure various objects and then graph
results. Work in groups to determine reasonable values.
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Write a paragraph explaining graph of estimates vs. measurement. Oral discussion of group results. | - Measurement In the Middle Grades, p. 15. - Developing Number Sense, p. 16-20.
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