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

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

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

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

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

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

Up next for you: Parts of algebraic expressions Get 3 of 4 questions to level up!

Understanding and solving exponents, radicals, and scientific notation without algebra.

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

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