Solving Multi-Step Equations: Beginner Algebra Lesson Plan For Ninth Grade Math

Ginean Royal
Categories : Lesson plans for high school math, grades 9 12
Tags : High school lesson plans & tips

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Prior Knowledge

Before this lesson your students should have previously learned how to write equations. This involves:

(a) translating

sentences into equations,

(b) translating equations into sentences,

(d) solving simple equations using multiplication or division. Now students will learn how to solve multi-step equations.

Common Core State Standards

A.REI.1: Explain each step in solving a simple equation as following from the equality of numbers asserted at the previous step, starting from the assumption that the original equation has a solution. Construct a viable argument to justify a solution method.

A.REI.3: Solve linear equations and inequalities in one variable, including equations with coefficients represented by letters.

Mathematical Practice(s)

Look for and express regularity in repeated reasoning.

Learning Target(s)

Applying order of operations and inverse operations to solve equations
Constructing an argument to justify my solution process

Essential Question(s)

What is one problem-solving strategy used to solve multi-step equations?

Answer: Working backwards or using the order of operations in reverse.

Vocabulary

Inverse operation, isolate, variable, constant, reciprocal, coefficient

LESSON

Notes:

Instruct that minus and negative are equivalent
GOAL: To isolated the specified variable
Instruct that what is done on one side of the equation (= sign), must be done on the other side of the = sign.

Utilize chilimath.com for the lesson today. There are two pages to view. Use all of the examples or as many as you choose.

* Reminder for students: that –x is the same as -1x & x is the same as 1x.

Guided Practice

3-6 practice problems. You can do 1or 2 problems with the students at the board (Smart Board, Elmo, etc.) and then put them in small groups of no more than 3 to do the rest. These problems can be pulled from any textbook or other resource.

Independent Practice

Approximately 5 problems to be done alone.

Closure/Review

Ask 1-3 questions relating to today’s lesson to be answered by the class as a whole. This will give you a general idea of the class’ understanding of today’s topic.

Exit Ticket

This is to be done the last 3-5 minutes of class and given to you (by hand or in a designated area of your room) as they leave class. Possible question(s):

Solve this problem: 5k + 3 = 23

(Answer: k = 4)

This post is part of the series: Beginner Algebra

Make algebra easier for your students with these introductory lesson plans.