Unit 3, Lesson 18
A Lot of Fractions to Add
Grade 4
Preparation
Lesson Purpose
The purpose of this lesson is for students to find the sum of three or more tenths and hundredths.
Lesson Narrative
Previously, students learned to find sums of fractions with the same denominator and sums of tenths and hundredths. They added two or more tenths and hundredths, applying the commutative and associative properties along the way. This lesson prompts students to apply their understanding and skills to solve problems in context, and to practice finding sums of three or more tenths and hundredths (including mixed numbers).
- Representation
- MLR8
- Determine the sum of three or more tenths and hundredths.
- Let’s add more than two fractions.
Required Preparation
Activity 1
- Gather a few coins of different thicknesses for display.
Activity 2
- Create six posters, each with a different addition expression from the activity.
Teacher Reflection Questions
As you finish up this unit, reflect on the norms and activities that have supported each student in learning math. List the ways you have seen each student grow as a young mathematician throughout this work. List the ways you have seen yourself grow as a teacher. What will you continue to do and what will you improve upon in the next unit?
Have a correction or suggestion?
Tell us about a typo, a broken link, or an improvement you’d like to see. We read every submission but can’t reply.
Have a question or need support instead? Visit our Contact Us page to reach our team.