Lesson: Solving Two-Step Equations with Justifications

Presentation

•

Mathematics

•

9th Grade

•

Practice Problem

•

Medium

•

CCSS

6.NS.B.3, HSA.REI.A.1

Standards-aligned

Christopher Gassler

Used 15+ times

FREE Resource

5 Slides • 6 Questions

Multiple Choice

Do you have your notebook out and ready to take notes?

(you will need to take a picture and upload it at the end)

YES, I have my notebook out, I mean, I want to learn and be successful.

Uh...No, and I know it means a bad grade, I have accepted my fate.

Two-Step with Justifications

Objective: Solve two-step equations with justifications

Match

WARMUP: Match the following equations with the property it illustrates.

$3x-1+1=4+1$

$9x+2-2=5-2$

$2\times\frac{x}{2}=-4\times2$

$\frac{5x}{5}=\frac{15}{5}$

Addition Property of Equality

Subtraction Property of Equality

Multiplication Property of Equality

Division Property of Equality

Properties of Equality

VOCABULARY

To justify a solution, students will need to be able to use appropriate mathematical language to give reasons for the particular approach used to solve a problem. Any time that a student produces a 'solution' in an attempt to solve a problem, that 'solution' needs to be justified.

Justification

This video has multi-step equations in it but you can see the idea and apply it to the two-step equations we are doing.

EXAMPLE

Solve and identify the justification used

6x - 3 = 39

STEPS

JUSTIFICATION

Reorder

Reorder the justification with the problem solved.

Given

Addition Property of Equality

Simplify / Combining Like Terms

Division Property of Equality

Simplify

EXAMPLE

Which justification is missing?

Multiple Choice

Which justification is missing?

Addition Property of Equality

Subtraction Property of Equality

Multiplication Property of Equality

Division Property of Equality

Multiple Choice

Which justification would be used for STEP 2?

Addition Property of Equality

Subtraction Property of Equality

Multiplication Property of Equality

Division Property of Equality

Simplify

Fill in the Blanks

Type answer...

Do you have your notebook out and ready to take notes?

(you will need to take a picture and upload it at the end)

YES, I have my notebook out, I mean, I want to learn and be successful.

Uh...No, and I know it means a bad grade, I have accepted my fate.

Show answer

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MULTIPLE CHOICE

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Lesson: Solving Two-Step Equations with Justifications

​Two-Step with Justifications

​Properties of Equality

​VOCABULARY

​To justify a solution, students will need to be able to use appropriate mathematical language to give reasons for the particular approach used to solve a problem. Any time that a student produces a 'solution' in an attempt to solve a problem, that 'solution' needs to be justified.

​Justification

​EXAMPLE

​Solve and identify the justification used

​6x - 3 = 39

​STEPS

​JUSTIFICATION

​EXAMPLE

​Which justification is missing?

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Mathematics

Two-Step with Justifications

Properties of Equality

VOCABULARY

To justify a solution, students will need to be able to use appropriate mathematical language to give reasons for the particular approach used to solve a problem. Any time that a student produces a 'solution' in an attempt to solve a problem, that 'solution' needs to be justified.

Justification

EXAMPLE

Solve and identify the justification used

6x - 3 = 39

STEPS

JUSTIFICATION

EXAMPLE

Which justification is missing?