Lesson Plan: Relating Addition to Subtraction: Numbers up to 1,000 Mathematics • 3rd Grade
This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to recognize that addition and subtraction are inverse operations, create addition and subtraction fact families, and use inverse operations to check answers to addition and subtraction problems.
Objectives
Students will be able to
- recognize that addition and subtraction are inverse operations,
- use inverse operations to check answers to addition or subtraction problems involving three-digit numbers,
- create addition and subtraction fact families with three-digit numbers using inverse operations,
- use inverse operations to find missing numbers in number sentences.
Prerequisites
Students should already be familiar with
- addition and subtraction facts,
- strategies for solving addition and subtraction problems involving two-digit and three-digit numbers,
- fact families involving two-digit numbers.
Exclusions
Students will not cover
- dealing with numbers with more than three digits.