If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

Main content

4th grade (2018 edition)

Not feeling ready for this? Check out Get ready for 4th grade.

We’ve updated this course!

We’ve recently made improvements to 4th grade math! You are currently viewing the older edition.
Learn more or access newer edition

Addition and subtraction

Mastery unavailable
Adding multi-digit numbers: Addition and subtractionSubtracting multi-digit numbers: Addition and subtraction

Multiplication and division

Multiplication by 10s, 100s, and 1000s: Multiplication and divisionMulti-digit multiplication: place value and area models: Multiplication and divisionMulti-digit multiplication: standard algorithm: Multiplication and divisionComparing with multiplication: Multiplication and division
Division problems that work out nicely: Multiplication and divisionDivision: place value and area: Multiplication and divisionMulti-digit division: Multiplication and divisionRemainders: Multiplication and divisionMultiplication, division word problems: Multiplication and division

Fractions

Equivalent fractions: FractionsCommon denominators: FractionsComparing fractions with unlike denominators visually: FractionsComparing fractions with unlike denominators: FractionsDecomposing fractions: FractionsAdding and subtracting fractions: word problems: Fractions
Mixed numbers: FractionsAdding and subtracting mixed numbers: FractionsAdding and subtracting fractions with like denominators: FractionsMultiplying unit fractions and whole numbers: FractionsMultiplying whole numbers and fractions: FractionsMultiplying whole numbers and fractions word problems: FractionsFractions with denominators of 10 and 100: Fractions

Decimals

Intro to decimals: DecimalsDecimals on the number line: DecimalsDecimals vs. fractions: DecimalsDecimals greater than one: Decimals
Converting decimals to fractions: DecimalsCommon fractions and decimals: DecimalsComparing decimals visually: DecimalsComparing decimals: Decimals

Measurement and data

Estimating mass: Measurement and dataEstimating volume: Measurement and dataEstimating length: Measurement and dataTime: Measurement and dataConverting units of mass: Measurement and dataConverting units of volume: Measurement and data
Converting units of length: Measurement and dataConverting units of time: Measurement and dataMoney word problems: Measurement and dataConversion word problems: Measurement and dataArea and perimeter: Measurement and dataLine plots with fractions: Measurement and data

Geometry

Lines, line segments, and rays: GeometryParallel and perpendicular: GeometryAngle introduction: GeometryMeasuring angles: GeometryConstructing angles: Geometry
Angles in circles: GeometryAngle types: GeometryDecomposing angles: GeometryLine of symmetry: GeometryClassifying triangles: GeometryClassifying geometric shapes: Geometry

Factors, multiples and patterns

Factors and multiples: Factors, multiples and patternsPrime and composite numbers: Factors, multiples and patternsMath patterns: Factors, multiples and patterns

Place value and rounding

Intro to place value: Place value and roundingHow 10 relates to place value: Place value and roundingWays to write whole numbers (expanded form and written form): Place value and rounding
Regrouping whole numbers: Place value and roundingComparing multi-digit numbers: Place value and roundingRounding whole numbers: Place value and rounding

Course challenge

Test your knowledge of the skills in this course. Have a test coming up? The Course challenge can help you understand what you need to review.
Community questions