About Course

Pre-algebra is the first math course in high school and will guide you through among other things integers, one-step equations, inequalities and equations, graphs and functions, percent, probabilities. We also present an introduction to geometry and right triangles. Learn pre-algebra for free—all of the basic arithmetic and geometry skills needed for algebra. Full curriculum of exercises and videos. This is the property of khanacademy.org and is available for free on their website.

Topics for this course

452 Lessons

Arithmetic properties

Place value
Finding place value
Place value tables
Writing a number in standard form
Writing a number in expanded form
Writing numbers in words and standard form
Comparing place values
Understanding place value
Place value when multiplying and dividing by 10
Regrouping numbers into various place values
Comparing whole number place values
Regrouping whole number place values
Adding whole numbers by their place values
Rounding whole numbers
Rounding to the nearest 10 on the number line
Rounding whole numbers to nearest ten
Rounding to the nearest 100 on the number line
Rounding whole numbers to nearest hundred
Rounding whole numbers to nearest thousand
Regrouping whole numbers
Regrouping whole numbers: 675
Regrouping whole numbers: 76,830
Regrouping whole numbers: 430
Order of operations
Intro to order of operations
Order of operations example
Worked example: Order of operations (PEMDAS)
Order of operations (2-step expressions)
Arithmetic properties
Properties of multiplication
Properties and patterns for multiplication
Commutative law of addition
Commutative law of multiplication
Commutative property of multiplication
Associative law of addition
Associative law of multiplication
Associative property of multiplication
Using associative property to simplify multiplication
Identity property of 1
Identity property of 0
Inverse property of addition
Inverse property of multiplication
Distributive property over subtraction
Distributive property exercise examples
Distributive property when multiplying
Distributive property
Distributive property over addition
Rational and irrational numbers
Intro to rational & irrational numbers
Classifying numbers: rational & irrational
Divisibility tests
Divisibility tests for 2, 3, 4, 5, 6, 9, 10
Recognizing divisibility
The why of the 3 divisibility rule
The why of the 9 divisibility rule
Factors and multiples
Finding factors of a number
Finding factors and multiples
Prime numbers
Prime numbers
Recognizing prime and composite numbers
Prime factorization
Prime factorization
Prime factorization exercise
Common divisibility examples
Least common multiple
Least common multiple
Least common multiple: repeating factors
Least common multiple of three numbers
Greatest common factor
Greatest common factor examples
Greatest common factor explained
GCF & LCM word problems

Reading and interpreting data


Volume of a rectangular prism

Negative numbers and coordinate plane

Ratios, rates, proportions

Equations, expressions, and inequalities

Exponents, radicals, and scientific notation

About the instructor

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45 Courses

220 students


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