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

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This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to subtract from three-digit numbers when we have to regroup a hundred and record the calculation in columns.

Objectives

Students will be able to

subtract two- and three-digit numbers from three-digit numbers with regrouping of hundreds,
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 with regrouping of tens.

Exclusions

Students will not cover

column subtraction with regrouping of tens and hundreds,
subtracting across zero,
estimating answers,
numbers with more than three digits.