Course Content
Variables, Expressions, and Arithmetic Review
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Solving Equations
Problem Solving with Equations and Inequalities
Exponents
Rational Numbers and Applications
Geometry
Data Analysis and Statistics
Probability
Square Roots and the Pythagorean Theorem
Relations and Functions
Pre-Algebra
About Lesson

A variable is like a placeholder, usually shown as a letter, that stands for a number or something that’s changing. When we talk about a variable expression, we mean a math phrase that has both variables and numbers mixed together with math actions.

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