Your device is currently offline. You can view downloaded files in My Downloads.

Lesson Plan

5. Commutative property of addition with three addends (FP)

teaches Common Core State Standards CCSS.Math.Content.1.OA.B.3
teaches Common Core State Standards CCSS.Math.Practice.MP7
Quick assign

You have saved this lesson!

Here's where you can access your saved items.


Card of

or to view additional materials

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

Lesson objective: Prove that changing the order of the addends does not change the sum.

This lesson helps to build fluency with adding three numbers in any order.  A number line is used here because it supports the understanding that adding numbers in any order will give you the same sum. This work develops students' understanding that we can add numbers in any order.

Students engage in Mathematical Practice 7 (Look for and make use of structure) as they change the order of the addends to help them find the sum.

Key vocabulary:

  • addend: one of the numbers in an indicated sum of two or more numbers (e.g., 4 + 3 + 1 = 8; 4, 3, and 1 are addends)
  • number line: a line on which a point represents a value or number
  • order: to place numbers or objects in a sequential arrangement (e.g., least to greatest or heaviest to lightest)

  • sum: the result when two or more quantities are added

  • total: the whole amount or value

Special materials needed:

  • number lines (0-20)
Related content

Appears in

Applying properties of operations to solve addition problems

Provide feedback