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Adding and
Subtracting Decimals
Performance Task Objectives
- Read and write decimals
to thousandths
- Compare, order, and round
decimals to hundredths
- Add and subtract decimals
- Interpret and display data
on bar graphs
Sunshine State Standards
Materials
- Student recording sheet
- Centimeter graph paper
- Paper and pencil
Student arrangement
- Individual or small group
Task
Present the problem on the student Recording Sheet to your students.
Performance Criteria
- Does the student correctly
interpret the data on the chart?
- Does the student use a reasonable
scale for the bar graph?
- Does the student label the
bar graph accurately?
- Is the student able to order,
round, and compare the decimals in the problem?
Directions:
1. Using the given data, construct a bar graph showing the batting averages
of these National league batting champions.
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National
League Champions
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Year
|
Player
|
Batting
Average
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1988
|
Tony
Gwynn
|
.313
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1989
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Tony
Gwynn
|
.336
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1990
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Willie
McGee
|
.335
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1991
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Terry
Pendleton
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.319
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1992
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Gary
Sheffield
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.330
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Using the data and your graph,
complete the following activities.
2. List the players’ averages in order from the highest batting average
to the lowest batting average.
3. How much better is the batting average of the player with the highest
average than that of the player with the lowest average? How do you know?
4. If rounded to the nearest hundredth, which players will have the same
average?
5. Write two statements about the batting averages as shown on your graph.
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