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Laabri

RCN Lesson 15: Stories with Fractions

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Last updated over 3 years ago
13 Nsɛmmisa

Launch: Number Talk - (7 min)

I'll model question 2

We'll do question 3

You do question 4

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?

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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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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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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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?

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7.

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