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RCN Lesson 15: Stories with Fractions

Last updated over 2 years ago
13 questions
Develop Understanding
Today's Learning Goal: (G4, U9, L3)
  • Add and subtract fractions and mixed numbers with like denominators.
  • Compare fractions and mixed numbers by reasoning about equivalence.
  • Solve and create word problems involving addition and subtraction of fractions referring to the same whole.
Today's Materials:
  • Laptop
  • Laptop charger
  • Pen/Pencil/Paper (optional)
Please complete the Jump Start (activator). You have 5 minutes before we review. This is independent it should be silent.
Reminders:
1. Ready for class
2. No cellphones
3. Volume must be low.
4. Read and follow all directions
5.) Take your bag off and immediately begin the Activator.

Jump Start: Number Talk: One Whole, Many Names - (5min)

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1

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1

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1

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1

Launch: Number Talk - (7 min)


I'll model question 2
We'll do question 3
You do question 4

Activity 1 - Relay Race at Recess (20 min)

Students in the fourth-grade class had a relay race during recess.
Each team had four runners. Each runner ran the length of the school playground.
Here are the times of the runners for two teams.
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Which team won the relay race? Show your reasoning.

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How much faster is the winning team than the other team? Show your reasoning

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The record time for the playground relay race was 40.27 seconds. Did the winning team beat this record time? Show your reasoning.

Activity 2 - You be the author (15 min)

Groups of 2.


Think of three situations as described here.

After each problem is written, trade papers with a partner to compare your problems and check your solutions.

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A problem that can be solved by addition and has 9 2/5 as an answer.

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A problem that can be solved by subtraction and has 32/100 as an answer.

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A problem that could be solved by writing the equation: 9 - x = 3 3/5

Lesson Synthesis - (10 min)

In this lesson, we have solved many problems that involved adding, subtracting, multiplying, and comparing fractions.

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What are two things that you have learned from listening to the ideas of other students in these lessons

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What is one thing you want to continue to practice when solving problems with fractions?

Cool Down - (5 min)

Mai's Milky Cereal


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4

There were 7 cups of milk before Mai made breakfast. Now there are 2 2/8 cups of milk. How much did Mai use for breakfast?

Closure Questions:

  • How do you convert from improper to mixed fractions?
  • How do you convert from mixed to improper?
  • 6/8 = 3/4 is called a what?