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Setting Up Expressions and Inequalities

Build algebraic thinking from the ground up. Learn to read expressions, write equations and inequalities, and model everyday situations like budgets, bills, and schedules with confidence.

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Verified skills you'll gain

DEVELOPING

Evaluating Expressions

DEVELOPING

Mathematical Modeling

DEVELOPING

Reading Mathematical Language

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Course 2

Model Situations with Expressions

4 lessons

20 practices

You’ll turn everyday situations—like shopping, work, and travel—into expressions that represent real relationships. You’ll build expressions step by step, use grouping when needed, and recognize when different expressions represent the same situation.

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Course 3

Set Up Equations and Inequalities

4 lessons

19 practices

You’ll translate real-world constraints into math. You’ll represent exact targets with equations, interpret everyday language into inequalities, and model limits and ranges from budgets, rules, and schedules.

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Course 4

Understand and Use Math Models in Real Life

4 lessons

22 practices

You’ll use expressions, equations, and inequalities to understand real situations. By plugging in values, estimating results, and interpreting constraints, you’ll learn how to check whether a model makes sense and explain what it means in everyday terms.

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From our community

Hear what our customers have to say about CodeSignal Learn

I'm impressed by the quality and can't stop recommending it. It's also a lot of fun!

Francisco Aguilar Meléndez

Data Scientist

+11

I love that it's personalized. When I'm stuck, I don't have to hope my Google searches come out successful. The AI mentor Cosmo knows exactly what I need.

Faith Yim

Software Engineer

+14

It's an amazing product and exceeded my expectations, helping me prepare for my job interviews. Hands-on learning requires you to actually know what you are doing.

Alex Bush

Full Stack Engineer

I'm really impressed by the AI tutor Cosmo's feedback about my code. It's honestly kind of insane to me that it's so targeted and specific.

Abbey Helterbran

Tech consultant

I tried Leetcode but it was too disorganized. CodeSignal covers all the topics I'm interested in and is way more structured.

Jonathan Miller

Senior Machine Learning Engineer

+12

I'm impressed by the quality and can't stop recommending it. It's also a lot of fun!

Francisco Aguilar Meléndez

Data Scientist

+11

From our community

Hear what our customers have to say about CodeSignal Learn

I'm impressed by the quality and can't stop recommending it. It's also a lot of fun!

Francisco Aguilar Meléndez

Data Scientist

+11

I love that it's personalized. When I'm stuck, I don't have to hope my Google searches come out successful. The AI mentor Cosmo knows exactly what I need.

Faith Yim

Software Engineer

+14

It's an amazing product and exceeded my expectations, helping me prepare for my job interviews. Hands-on learning requires you to actually know what you are doing.

Alex Bush

Full Stack Engineer

I'm really impressed by the AI tutor Cosmo's feedback about my code. It's honestly kind of insane to me that it's so targeted and specific.

Abbey Helterbran

Tech consultant

I tried Leetcode but it was too disorganized. CodeSignal covers all the topics I'm interested in and is way more structured.

Jonathan Miller

Senior Machine Learning Engineer

+12

I'm impressed by the quality and can't stop recommending it. It's also a lot of fun!

Francisco Aguilar Meléndez

Data Scientist

+11