Home › Lessons › 9th Grade Math

Inequalities and Absolute Value

9th Grade · Math · Easy · about 10 minutes

HSA-REI.B.3 | Inequalities and Absolute Value - Easy level

The first two lessons in every grade and subject are free. This one is part of Premium ($10/month), which unlocks the full catalogue Pre-K through 12th grade plus SAT and ACT prep. See what Premium includes.

Standards referenced

• CCSS.Math.Content.HSA-REI.A.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 t

A standards reference identifies a related skill. It does not certify complete instruction or assessment coverage.

More 9th Grade math lessons

• Solving Linear Equations
• Graphing Linear Functions
• Systems of Equations
• Exponent Rules and Properties
• Polynomials: Add, Subtract, Multiply
• Factoring Polynomials
• Quadratic Functions and Graphs
• Radical Expressions

Browse the rest of the site

• All lessons, Pre-K through 12th grade
• Practice tests and full-length SAT & ACT exams
• Homework help — photograph the page
• Common Core, NGSS and SAT/ACT standards references
• Pricing

© 2026 UScore Academy. U.S.-focused supplemental learning for Pre-K through 12th grade.

Privacy Policy | Terms of Service | About Us | Contact