Math Curriculum

Level C
Unit: Number Base Ten (Decimals)
Key Lesson 6.5.13 Dividing Decimals by Decimals

Lesson topic: Dividing decimals by decimals

Instructor Materials

  • Teacher guide
  • Slides
  • Practice Problems resource
  • CCRS standard: 6.NS.2, 6.NS.3, 6.EE.4
  • Learning goal: Compare and contrast (orally and using other representations) division problems with whole-number and decimal divisors. Divide whole numbers or decimals by decimals and explain the reasoning (orally and using other representations), including choosing to divide a different expression that gets the same quotient. Generate another division expression that has the same value as a given expression and justify (orally) that they are equal.
  • 6.5 Assessment and Practice Problems

Student Materials

Related Lessons

Review and Extend

Use these supplemental lessons if needed after teaching this key lesson.




Used with permission:

1. IM K-5 Math was originally developed by Open Up Resources (OUR) and authored by Illustrative Mathematics® (IM), and is copyrighted 2017-2019 by Open Up Resources. It is licensed under the Creative Commons Attribution 4.0 International License (CC BY 4.0). OUR's K-5 Math Curriculum is available at

2. Adaptations and updates to IM K-5 Math are copyrighted 2019 by Illustrative Mathematics®, and are licensed under the Creative Commons Attribution 4.0 International License (CC BY 4.0).

3. The Illustrative Mathematics® name and logo are not subject to the Creative Commons license and may not be used without the prior and express written consent of Illustrative Mathematics®.

4. This site includes public domain images or openly licensed images that are copyrighted by their respective owners. Openly licensed images remain under the terms of their respective licenses. See the image attribution section for more information.

Get the free download of Adobe Acrobat Reader.