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Multiplying
and Dividing Fractions
Performance Task Objectives
- Multiply whole numbers and
fractions
Sunshine State Standards
Materials
- Student recording sheet
- Counting chips (optional)
- Calculator (optional)
- 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 understand
what “finding a fraction of a number” means?
- Can the student determine
prices after each 10-day interval?
- Does the student use an
appropriate strategy for determining all possible combinations of items
to be purchased after 10 days?
- Can the student explain
why the designated purchases could or could not be made?
Directions:
A warehouse sells clothing at a fraction of its original cost. The table
below shows the fraction off the original price for clothing that remains
in the warehouse after 10 days, 20 days, and 30 days.
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WAREHOUSE
PRICES
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Item
|
Price
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After
10 Days
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After
20 Days
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After
30 Days
|
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Jacket
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$120
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1/4
off
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1/3
off
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1/2
off
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Shoes
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$40
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1/5
off
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2/5
off
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3/5
off
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Shirt
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$12
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1/4
off
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1/3
off
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2/3
off
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1. Find the price of the items
after each 10-day period to complete the chart below. Show how you arrived
at each answer.
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WAREHOUSE
PRICES
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Item
|
Price
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After
10 Days
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After
20 Days
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After
30 Days
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Jacket
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$120
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$90
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Shoes
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$40
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|
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Shirt
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$12
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$4.00
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Suppose
you have $100.00 to spend.
2. Within the range of $90.00 to $100.00, what are all possible
combinations of items you could buy after 10 days?
3. Would you have enough money
to buy 2 jackets after 20 days? Why or why not?
4. Could you buy all 3 items
if you waited until after 30 days? Remember, you only have $100.00 to
spend. Why or why not?
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