Root Beer Floats
Have you ever had a rootbeer float?
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A fourth grade class earned a root beer float party.
What would you need to know if you were in charge of buying the ingredients?
During the debrief, allow students to share their own thinking/representation/strategies.
The following debrief slides might be one possibility that is shared.
A fourth grade class earned a root beer float party.
What would you need to know if you were in charge of buying the ingredients?
You might have said…
How many students are in the class?
How much ice cream should I buy?
How much root beer do I need to buy?
How is root beer sold?
To make one root beer float you need 250 milliliters of root beer.
That is great information but we still can’t answer the question.
We still need to know how many students there are in the class and how root beer is sold.
Unpack the problem:
A 4th grade class of 20 students earned a rootbeer float party. To make one root beer float you need 250 milliliters of root beer. How many liters of root beer does the teacher need to buy for the root beer float party?
What do we know? | What will your answer tell you? |
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During the debrief, allow students to share their own thinking/representation/strategies.
The following debrief slides might be one possibility that is shared.
A 4th grade class of 20 students earned a root beer float party. To make one root beer float you need 250 milliliters of root beer.
What do we know? | My Answer |
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Solve: A fourth grade class of 20 students earned a root beer float party. To make one root beer float you need 250 milliliters of root beer.
How many liters of root beer does the teacher need to buy for the root beer float party?
During the debrief, allow students to share their own thinking/representation/strategies.
The following debrief slides might be one possibility that is shared.
Debrief: How did you solve this problem?
250 x 20 = 2,500 + 2,500 = 5,000
x | 10 | 10 |
250 | 2,500 | 2,500 |
The teacher will buy 5,000 ml of root beer.
Pose the Problem:
Root beer is only sold one way at the store. It is sold in 2 liter bottles. How many 2 liter bottles will the teacher need to buy?
The teacher needs 5,000 ml of root beer.
Root beer is sold in 2 liter bottles.
How many 2 liter bottles will the teacher need to buy?
1 liter = 1,000 ml.
How will this formula help you?
Pose:
The teacher needs 5,000 ml of root beer.
Root beer is sold in 2 liter bottles.
How many 2 liter bottles will the teacher need to buy?
1 liter = 1,000 ml.
Solve:
The teacher needs 5,000 ml of root beer.
Root beer is sold in 2 liter bottles.
How many 2 liter bottles will the teacher need to buy?
Solve:
After each person has had a root beer float, how many milliliters of root beer will be left over? Explain how you know.
Solve:
A 2 liter bottle of root beer costs $1.85.
How much will the teacher spend on root beer?
Solve:
After buying the ice cream and the root beer, the teacher gave the cashier a $20 bill and got back $2.45. She bought 3 containers of ice cream. How much did she spend on each container of ice cream?
Root Beer Floats
Name _____________________________________________
A fourth grade class of 20 students earned a root beer float party. To make one root beer float you need 250 milliliters of root beer. How many 2 liter bottles of root beer does the teacher need to buy for the root beer float party?
Name ___________________________________________
After each person has had a root beer float, how many milliliters of root beer will be left over? Explain how you know.
A 2 liter bottle of root beer costs $1.85. How much will the teacher spend on root beer?
After buying the ice cream and the root beer, the teacher gave the cashier a $20 bill and got back $2.45. She bought 3 containers of ice cream. How much did she spend on each container of ice cream?