Lesson 19
Usemos propiedades para multiplicar decimales
Lesson Purpose
Lesson Narrative
In previous lessons, students used diagrams and expressions to articulate strategies for multiplying a whole number and a decimal. The purpose of this lesson is solidify this understanding as they match many different expressions for a single product and choose one to find the value. They think strategically about which expression to use. In previous lessons, the strategies included using whole number products and the associative property or using the distributive property. This lesson introduces one more strategy, compensation which is also an example of the distributive property. In the second activity, students choose from these different strategies to find the value of more complex products of a whole number and a decimal.
- Engagement
Learning Goals
Teacher Facing
- Use properties of operations to interpret and evaluate multiplication expressions with decimals and whole numbers.
Student Facing
- Interpretemos y evaluemos expresiones de multiplicación que tienen números decimales y números enteros.
Required Materials
Materials to Copy
- Decimal Multiplication Expression Card Sort
Required Preparation
Lesson Timeline
Warm-up | 10 min |
Activity 1 | 20 min |
Activity 2 | 15 min |
Activity 3 | 10 min |
Lesson Synthesis | 10 min |
Cool-down | 5 min |
Teacher Reflection Questions
Suggested Centers
- Target Numbers (1–5), Stage 8: Add Tenths or Hundredths (Addressing)
- Target Numbers (1–5), Stage 9: Subtract Tenths or Hundredths (Addressing)
Print Formatted Materials
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Student Task Statements | docx | |
Lesson Cover Page | docx | |
Cool Down | Log In | |
Teacher Guide | Log In | |
Teacher Presentation Materials | docx | |
Blackline Masters | zip |