OAT Lesson 2: Compare Reptile Lengths in Story Problems

Last updated about 3 years ago

20 Nsɛmmisa

Today, you solved story problems by comparing lengths. You used diagrams to help you think about which reptile was longer or shorter and to help you think about finding the difference.

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OAT Lesson 2: Compare Reptile Lengths in Story Problems

Last updated about 3 years ago

20 Nsɛmmisa

Develop Understanding

Today's Learning Goal: (G2, U3, L6)

Solve addition and subtraction story problems about length.

Today's Materials:

Laptop
Laptop charger
Pen/Pencil/Paper/Expo Marker (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 Fives and Tens - (5 min)

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For each problem find the value of each expression mentally.

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Launch: Adding and Subtracting Word Problems - (10 min)

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I do (Question 2)

We Do (Question 3)

You Do (Question 4)

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Andre’s snake is 85 centimeters long. His lizard is 28 centimeters long. How many centimeters longer is Andre’s snake than his lizard? (Show your thinking.)

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Adrianna's tortoise is 55 millimeters long. Her snake is 45 millimeters long. How many millimeters longer is Adrianna's tortoise than her snake? (Show your thinking.)

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David's iguana is 23 inches long. His lizard is 8 inches long. How many inches longer is David's iguana than his lizard.

Activity 1: Who's Pet is Longer? - (15 min)

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Lin’s pet lizard is 62 cm long. It is 19 cm shorter than Jada’s. How long is Jada’s pet lizard?

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Diego and Mai have pet snakes. Mai’s snake is 17 cm longer than Diego’s. Mai’s snake is 71 cm. How long is Diego’s pet snake?

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Activity 2: Guess My Reptile - (15 min) (Groups of 2)

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Partner A Reptile:

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Choose one reptile from your list and one reptile from your partner’s list.

Partner B:

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Fill in the blanks to create a story problem using the lengths of the reptiles you picked. Then share your sentences with your partner.

My reptile is cm long.

It is cm (shorter/longer) than one of your reptiles.

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Which reptiles did your partner pick? (Show your thinking.)

Lesson Synthesis: Representations - (5 min)

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Today, you solved story problems by comparing lengths. You used diagrams to help you think about which reptile was longer or shorter and to help you think about finding the difference.

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How did the diagram help you think about which animal was longer?

How did the diagram help you decide if you would add or subtract?

Cool Down: Kiran and Han Compare Pets - (5 min)

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Kiran’s pet snake is 47 cm long. It is 26 cm shorter than Han’s pet snake. How long is Han’s pet snake?

2.OA.A.1

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Select the diagram that matches the story.

A.)

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B.)

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Closure Questions:

How do you feel about today's material?
What are some ways we can represent word problems?
Whats the difference between an expression and an equation?

OAT Lesson 2: Compare Reptile Lengths in Story Problems

Today, you solved story problems by comparing lengths. You used diagrams to help you think about which reptile was longer or shorter and to help you think about finding the difference.

OAT Lesson 2: Compare Reptile Lengths in Story Problems

Jump Start: Number Talk Fives and Tens - (5 min)

For each problem find the value of each expression mentally.

Launch: Adding and Subtracting Word Problems - (10 min)

I do (Question 2)

We Do (Question 3)

You Do (Question 4)

Andre’s snake is 85 centimeters long. His lizard is 28 centimeters long. How many centimeters longer is Andre’s snake than his lizard? (Show your thinking.)

Adrianna's tortoise is 55 millimeters long. Her snake is 45 millimeters long. How many millimeters longer is Adrianna's tortoise than her snake? (Show your thinking.)

David's iguana is 23 inches long. His lizard is 8 inches long. How many inches longer is David's iguana than his lizard.

Activity 1: Who's Pet is Longer? - (15 min)

Lin’s pet lizard is 62 cm long. It is 19 cm shorter than Jada’s. How long is Jada’s pet lizard?

Diego and Mai have pet snakes. Mai’s snake is 17 cm longer than Diego’s. Mai’s snake is 71 cm. How long is Diego’s pet snake?

Activity 2: Guess My Reptile - (15 min) (Groups of 2)

Partner A Reptile:

Choose one reptile from your list and one reptile from your partner’s list.

Which reptiles did your partner pick? (Show your thinking.)

Lesson Synthesis: Representations - (5 min)

Today, you solved story problems by comparing lengths. You used diagrams to help you think about which reptile was longer or shorter and to help you think about finding the difference.

How did the diagram help you think about which animal was longer?

How did the diagram help you decide if you would add or subtract?

Cool Down: Kiran and Han Compare Pets - (5 min)

Kiran’s pet snake is 47 cm long. It is 26 cm shorter than Han’s pet snake. How long is Han’s pet snake?

Select the diagram that matches the story.

Closure Questions:

Jump Start: Number Talk Fives and Tens - (5 min)

For each problem find the value of each expression mentally.

Launch: Adding and Subtracting Word Problems - (10 min)

I do (Question 2)

We Do (Question 3)

You Do (Question 4)

Andre’s snake is 85 centimeters long. His lizard is 28 centimeters long. How many centimeters longer is Andre’s snake than his lizard? (Show your thinking.)

Adrianna's tortoise is 55 millimeters long. Her snake is 45 millimeters long. How many millimeters longer is Adrianna's tortoise than her snake? (Show your thinking.)

David's iguana is 23 inches long. His lizard is 8 inches long. How many inches longer is David's iguana than his lizard.

Activity 1: Who's Pet is Longer? - (15 min)

Lin’s pet lizard is 62 cm long. It is 19 cm shorter than Jada’s. How long is Jada’s pet lizard?

Select the diagram that matches the story.

Diego and Mai have pet snakes. Mai’s snake is 17 cm longer than Diego’s. Mai’s snake is 71 cm. How long is Diego’s pet snake?

Select the diagram that matches the story.

Activity 2: Guess My Reptile - (15 min) (Groups of 2)

Partner A Reptile:

Choose one reptile from your list and one reptile from your partner’s list.

Which reptiles did your partner pick? (Show your thinking.)

Lesson Synthesis: Representations - (5 min)

How did the diagram help you think about which animal was longer?

How did the diagram help you decide if you would add or subtract?

Cool Down: Kiran and Han Compare Pets - (5 min)

Kiran’s pet snake is 47 cm long. It is 26 cm shorter than Han’s pet snake. How long is Han’s pet snake?

Select the diagram that matches the story.

Solve. Show your thinking.Han snake is ______ cm long.

Closure Questions:

Select the diagram that matches the story.

Select the diagram that matches the story.

Solve. Show your thinking.Han snake is ______ cm long.

Solve. Show your thinking.
Han snake is ______ cm long.

Solve. Show your thinking.
Han snake is ______ cm long.