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Base ten blocks are great tools for developing not only an understanding of whole numbers, but of decimals as well. This upper-elementary lesson uses these versatile manipulatives and the array model to teach young mathematicians how to multiply and divide decimals. Consider breaking this lesson up across multiple days, ensuring learners have sufficient time to practice and become comfortable with multiplication before moving onto division. To maximize student success, use base-ten blocks when teaching addition and subtraction of decimals, familiarizing the class with this approach to modeling decimals before introducing the operations of multiplication and division.

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##### Pros

- Offers ideas for extending and differentiating the lesson to meet the learning needs of all students
- Describes common misunderstandings to address when teaching the multiplication and division of decimals
- Provides a list of questions to ask during the lesson to assess student understanding

##### Cons

- Additional guided and independent practice problems are required to support students with learning to multiply and divide decimals
- Assumes learners are familiar with the place value of decimals

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