Multiplying Decimals and Whole Numbers: Using an Area Model

This lesson teaches how to multiply decimals and whole numbers using an area model. It begins with a review of base 10 blocks for representing numbers, then explains decimal representation. The lesson highlights common mistakes in decimal multiplication and introduces smart estimation. Through examples, such as a pancake recipe, it demonstrates practical applications of these concepts. The lesson concludes with a summary of the key points covered.

Explain the common mistake people make when multiplying decimals.

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How did the teacher estimate the product of 2.4 and 1.3?

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What is the area model used for in multiplying decimals and whole numbers?

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What steps did the teacher take to multiply 1.5 by 3.5 using the area model?

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What was the final answer when Valerie multiplied 1.5 by 3.5, and how does it compare to the smart estimate?

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