Grade 5, Video 5 Multiplying and Dividing Fluently with Ryan Flessner
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This video addresses Indiana Academic Standard for Math 5.C.8: Add, subtract, multiply, and divide decimals to hundredths, using models or drawings and strategies based on place value or the properties of operations. Describe the strategy and explain the reasoning. Math education consultant Ryan Flessner helps educators envision the teaching and assessment of this standard in Grade 5.
Students in fifth grade begin to explore multiplication and division with decimals. It is important to note that the newness of these ideas demands that students focus on conceptual understandings rather than simply applying rote procedures to these problems. Even though fifth graders are introduced to the standard U.S. algorithm for multiplication (5.C.1), it is important for educators to remember that this algorithm should not yet be translated to multiplication with decimals. Similarly, the standard U.S. algorithm for division is not formally introduced until Grade 6 (6.C.1); therefore, educators should avoid its use in relation to this standard.
It is important to note that this strand focuses on multiplication and division. For ideas related to addition and subtraction with decimals to hundredths, please see the “Adding and Subtracting Fluently” series.
Number sense skills (e.g., estimation and place value understandings), concrete materials (e.g., base ten blocks), and multiple strategies (e.g., ratio tables, the area model, and partial products/quotients) allow for deep understandings related to multiplication and division with decimals. Assessments should encourage correct answers and correct thinking. Students should be given a wide array of opportunities (written and oral) to explain their conceptual understandings related to multiplication and division with decimals.
Intro and outro music by bensound.com.
For more info and resources, visit partnershipforinquirylearning.org.
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