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.

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

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

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

Explore arithmetic properties with Khan Academy's free pre-algebra lessons and interactive practice exercises.

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

Explore comprehensive Algebra 1 lessons, interactive exercises, and videos to master algebra concepts and enhance problem-solving skills on Khan Academy.

여러분에게 올바른 툴을 제공하기 위해 다음과 같은 도움이 필요한 경우 알려주세요 학습자 선생님 학부모 기초 대수학 (Pre-algebra) 단원 10 개 · 스킬 218 개 단원 1 연산법칙 (중등1학년) 단원 2 약수와 배수 …

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