Unit 5, Lesson 11
Make Sense of Decimal Addition
Grade 5
Preparation
Lesson Purpose
The purpose of this lesson is for students to add decimals in a way that makes sense to them.
Lesson Narrative
In this lesson, students extend their understanding of adding multi-digit whole numbers to evaluate sums with decimals. Students find sums in a way that makes sense to them. The activities in the lesson are designed to encourage students to think about composing new units. This allows them to build on their work with equivalent decimal values in the previous section as well as their whole number work in previous grades.
- Engagement
None
- Describe (orally and using other representations) strategies for adding decimal numbers to hundredths.
- Let’s add decimals.
Required Materials
Activity 1
Required Preparation
- Create a large chart titled “Decimal Addition” to display during the Lesson Synthesis.
Activity 1
- Each group of 2 needs hundredths grids and colored pencils, markers, or crayons.
Teacher Reflection Questions
How did the student work that you selected impact the direction of the discussion? What student work might you pick next time if you taught the lesson again?
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