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Copyright © Copyright © Swun MathSwun Math (^) Grade 8 Unit 4 Lesson 2 P TE

One-Step Equations

Procedural Lesson

Grade 8 · Unit 4 · Lesson 2
MC: 8.EE.7

Problem of the Day

Objective: I will solve one-step equations by applying inverse operations.

Vocabulary Teacher Resources

Inverse Operations: operations that undo each

other; the opposite operation

Addition Subtraction

Multiplication Division

Additive Inverse: a number and its opposite

whose sum is 0; also called a zero pair

(─3) + (3) = 0

Number Additive Inverse

y + 12 = 20

─ 12 ─ 12

y = 8

Multiplicative Inverse: a number and its

reciprocal; when these numbers are multiplied,

the product is 1.

− 5 ⋅

1

−5 = 1^

Number Multiplicative Inverse

4n = 12

4 푛푛

4

=

12

4

n = 3

Considerations:

Review inverse operations with students. Be sure to

reinforce the idea that an equation must stay equal.

Whatever is done to one side, must be done to the

other. Use a visual of a balance if needed. Revisit the

idea that when applying the additive inverse, a zero

pair emerges, and when applying the multiplicative

inverse, a set of factors with a product of 1 emerges.

Steps:

1. Work on the side with the variable.


2. Apply the additive inverse.


3. Apply the multiplicative inverse.


4. Check the solution by substituting.

Application of MPs:

MP 1 : What inverse operation is needed to solve

?

The inverse operation needed to solve the

problem is.

.

MP7: What patterns do you find when solving one-

step equations?

If there is a coefficient, then I need to apply

the inverse.

If there is a constant, then I need to apply the

inverse.

1 2 3 4 5 6 7 8

* * * * ^ *

MPs

Applied MP

* Embedded MP

Student Journal Pages

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