Lesson Plan: Adding Three Numbers Mathematics • 1st Grade

This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to use different strategies to add three 1-digit numbers in any order.


Students will be able to

  • add three 1-digit numbers,
  • explain that numbers can be added in any order,
  • choose which two numbers to add first,
  • identify when they can use strategies like making 10 or adding doubles.


Students should already be familiar with

  • number bonds to 10,
  • adding in any order,
  • doubles to 10,
  • adding using near doubles.


Students will not cover

  • word problems,
  • additions with a total greater than 20.

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