Lesson Plan: Column Subtraction of Three-Digit Numbers: Regrouping Tens | Nagwa Lesson Plan: Column Subtraction of Three-Digit Numbers: Regrouping Tens | Nagwa

Lesson Plan: Column Subtraction of Three-Digit Numbers: Regrouping Tens Mathematics • 2nd Grade

This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to use column subtraction to subtract from three-digit numbers when we have to regroup a ten.

Objectives

Students will be able to

  • subtract two- and three-digit numbers from three-digit numbers with regrouping of tens,
  • make connections between concrete and abstract models of regrouping,
  • use a formal algorithm to solve calculations.

Prerequisites

Students should already be familiar with

  • column subtraction of three-digit numbers without regrouping.

Exclusions

Students will not cover

  • regrouping of hundreds,
  • subtracting across zeros,
  • estimating answers,
  • numbers with more than three digits.

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