Unit 4 - Lesson 15 - Grade 3: Illustrative Mathematics

Which one doesn’t belong?

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Solve the problem. Explain or show your reasoning.Noah sees a large painted mural that has side lengths of 15 feet and 4 feet. What is the area of the mural?

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Solve the problem. Explain or show your reasoning.Noah’s family buys a mosaic that has 12 rows and 8 columns of 1 inch tiles. What is the area of the mosaic?

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Solve the problem. Explain or show your reasoning.At the art festival, Noah uses sidewalk chalk to help decorate a rectangular piece of sidewalk that is 6 feet by 14 feet. What is the area of the piece of sidewalk that Noah helped decorate?

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Solve the problem. Explain or show your reasoning.At the art festival, Noah buys a pack of stickers. There are 5 sheets and each sheet has 16 stickers. How many stickers are in the pack?

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As you visit the posters with your partner, discuss what is the same about the thinking shown on each poster.

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As you visit the posters with your partner, discuss what is different about the thinking shown on each poster.

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A rectangle is 6 feet by 15 feet. What is the area of the rectangle? Explain or show yourreasoning.

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