Lesson Plan: Adding Two-Digit Numbers with Regrouping Mathematics • 1st Grade

This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to add 2 two-digit numbers when crossing a ten and model this with place value models.


Students will be able to

  • identify sums that will involve regrouping,
  • use place value models to regroup ones,
  • use place value models to add 2 two-digit numbers,
  • draw models to add 2 two-digit numbers.


Students should already be familiar with

  • the place value of two-digit numbers,
  • decomposing two-digit numbers.


Students will not cover

  • adding on a number line,
  • using the formal column method to add,
  • sums over 100.

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