Lesson Plan: Subtracting Decimals with Hundredths: The Column Method
This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to use the column method to subtract two numbers with up to two decimal places with and without regrouping.
Objectives
Students will be able to
- use place value models to regroup when subtracting two decimals with up to two decimal places,
- make connections between concrete models used to subtract two decimals with up to two decimal places and the written column method,
- subtract two decimals with up to two decimal places without regrouping using the column method,
- subtract two decimals with up to two decimal places with regrouping using the column method,
- solve word problems involving subtracting two decimals with up to two decimal places.
Prerequisites
Students should already be familiar with
- using the column method to subtract two decimals with one decimal place,
- subtracting decimals using models,
- using place value models to represent decimals,
- the place values of tenths and hundredths.
Exclusions
Students will not cover
- subtracting decimals with more than two decimal places,
- subtracting more than two decimals.
