Learn pre-algebra—all of the basic arithmetic and geometry skills needed for algebra.

Aprende preálgebra: todas las habilidades fundamentales de aritmética y de geometría necesarias para el álgebra.

In this topic, we will look at 1- and 2-step equations, as well as expressions and inequalities.

Understanding and finding factors and multiples. After these videos, you'll be ready for fractions.

Khan Academy ... Khan Academy

The Algebra 1 course, often taught in the 9th grade, covers Linear equations, inequalities, functions, and graphs; Systems of equations and inequalities; Extension of the concept of a function; Exponential …

Learn patterns in math with Khan Academy's interactive lessons and practice questions, tailored to enhance your understanding and problem-solving skills.

Pre-algebra 15 units · 179 skills Unit 1 Factors and multiples Unit 2 Patterns Unit 3 Ratios and rates

Test yourself on the skills in this course and earn mastery points for what you already know!

This topic isn't algebra, but it is a survey of all of the most important pre-algebra skills you need to really digest algebra. These skills also tend to be pretty important in life in general!