Unit 5, Lesson 21
Multiply More Decimals
Grade 5
Preparation
Lesson Narrative
In this lesson, students use place value understanding and properties of operations to find products of decimals. The numbers are more complex in this lesson so diagrams representing the products are less helpful. Students find the values of both types of expressions they have worked with in the last several lessons, products of two decimals to the tenth, and products of a whole number and a decimal to the hundredth. Students find the products using a strategy of their choice. When students explain their reasoning, they will apply their understanding of place value to relate decimal products to whole number products based on the repeated reasoning they have acquired (MP3, MP7, MP8).
- Engagement
- MLR2
- Calculate the product of 2 decimals to hundredths and explain (orally) strategies used.
- Justify (orally and in writing) that the product of 2 decimals is equivalent to the product of 2 whole numbers and a power of 10.
- Let’s multiply decimals.
Required Preparation
None
Teacher Reflection Questions
Reflect on a time your thinking changed about something in class recently. How will you alter your teaching practice to incorporate your new understanding?