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.
WAREHOUSE
PRICES
|
Item
|
Price
|
After
10 Days
|
After
20 Days
|
After
30 Days
|
Jacket
|
$120
|
1/4
off
|
1/3
off
|
1/2
off
|
Shoes
|
$40
|
1/5
off
|
2/5
off
|
3/5
off
|
Shirt
|
$12
|
1/4
off
|
1/3
off
|
2/3
off
|
1. Find the price of the items
after each 10-day period to complete the chart below. Show how you arrived
at each answer.
WAREHOUSE
PRICES
|
Item
|
Price
|
After
10 Days
|
After
20 Days
|
After
30 Days
|
Jacket
|
$120
|
$90
|
|
|
Shoes
|
$40
|
|
|
|
Shirt
|
$12
|
|
|
$4.00
|
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?
|