Lesson plan

7. Use decomposition and regrouping to add (FP)

  • From K-5 Math Companion Curriculum
  • Created by
  • Standards
  • Tags:
teaches Common Core State Standards 3.NBT.A.2 http://corestandards.org/Math/Content/3/NBT/A/2
teaches Common Core State Standards MP7 http://corestandards.org/Math/Practice/MP7
Preview assignment >
Print / PDF

You have saved this lesson plan!

Here's where you can access your saved items.

Dismiss
Press ESC or click here to exit full screen

Tip: swipe on touch devices, use your keyboard's ← and → arrow keys, or clicker buttons to quickly navigate the lesson plan

or to view additional materials

You'll gain access to interventions, extensions, task implementation guides, and more for this lesson plan.

Lesson objective: Add numbers within 1000 by decomposing values to make regrouping easier.

This work develops students' understanding that the order of addends when adding will not affect the sum.

Students engage in Mathematical Practice 7 (Look for and make use of structure) as they use place value to decompose values into smaller amounts that can be used to make addition of numbers more efficient.

Key vocabulary:

  • addends
  • decompose
  • sum

Special materials needed:

  • base ten blocks