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  1. Pre-algebra - Khan Academy

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

  2. Preálgebra | Matemáticas por area | Khan Academy

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

  3. Patterns | Pre-algebra | Math | Khan Academy

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

  4. Factors and multiples | Pre-algebra | Math | Khan Academy

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

  5. Equations & inequalities introduction | Pre-algebra - Khan Academy

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

  6. Systems of equations | Pre-algebra | Math | Khan Academy

    Up next for you: Solutions of systems of equations Get 3 of 4 questions to level up!

  7. Pré-álgebra | Matemática | Khan Academy

    Aprenda pré-álgebra — todas as habilidades básicas da aritmética e geometria necessárias para álgebra.

  8. Ratios and rates | Pre-algebra | Math | Khan Academy

    Learn all about proportional relationships. How are they connected to ratios and rates? What do their graphs look like? What types of word problems can we solve with proportions?

  9. Exponents intro and order of operations | Pre-algebra - Khan …

    Learn about exponents, order of operations, and related math concepts through engaging lessons and practice exercises on Khan Academy.

  10. Multi-step equations | Pre-algebra | Math | Khan Academy

    Equations with variables on both sides: decimals & fractions Get 3 of 4 questions to level up!