# Lesson Plan: Addition and Subtraction of Algebraic Expressions Mathematics • 7th Grade

This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to add and subtract algebraic expressions by adding and subtracting like terms.

#### Objectives

Students will be able to

- form an addition or subtraction expression to represent a given word problem,
- combine like terms while adding or subtracting algebraic expressions to simplify them,
- solve problems that involve the addition or subtraction of two or more algebraic expressions by using the horizontal method and by using the vertical method,
- add or subtract algebraic expressions to solve geometric problems.

#### Prerequisites

Students should already be familiar with

- combining like terms,
- multiplying monomials,
- dividing monomials.

#### Exclusions

Students will not cover

- adding and subtracting algebraic equations,
- the multiplication and division of polynomials,
- factorization.