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Main content

Arithmetic

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Khan Academy Kids

Khan Academy Kids is our free comprehensive mobile app for kids ages two to six, covering math, reading, and more!

Khan Academy Kids, a free app for ages two to six.

Addition and subtraction

Basic addition and subtractionAddition and subtraction within 20Strategies for adding and subtracting within 100Addition within 100

Subtraction within 100Word problems within 100Multi-digit addition with regroupingMulti-digit subtraction with regrouping

Multiplication and division

Multiplication introMultiplication by 10s, 100s, and 1000sMultiplication: place value and area modelsMulti-digit multiplication Division intro

Division: place value and areaMulti-digit division (no remainders)RemaindersMulti-digit division (remainders)Multiplication and division word problems

Negative numbers

Intro to negative numbersOrder negative numbersNumber oppositesAbsolute value

Intro to adding negative numbersIntro to subtracting negative numbersAdding & subtracting negative numbersMultiplying & dividing negative numbers

Fractions introFractions on the number lineEquivalent fractionsComparing fractionsCommon denominatorsDecomposing fractionsAdding and subtracting fractions with like denominatorsMixed numbersAdding and subtracting fractions with unlike denominatorsAdding and subtracting mixed number with unlike denominators

Adding and subtracting fractions word problemsMultiplying whole numbers and fractionsMultiplication as scalingMultiplying fractionsMultiplying mixed numbersMultiplying fractions word problemsFractions as divisionDividing unit fractions and whole numbersDividing fractions by fractionsDividing fractions word problems

Intro to decimalsDecimals on the number lineRounding decimalsComparing decimalsRewriting decimals as fractions

Adding decimalsSubtracting decimalsAdding and subtracting decimals word problemsMultiplying decimalsDividing decimals

Staff picks

Adding 53+17 by making a group of 10

Strategies for adding and subtracting within 100

Add within 1000

Multi-digit addition with regrouping

Intro to negative numbers

Intro to negative numbers

Multiplying negative numbers

Multiplying & dividing negative numbers

Intro to fractions

Fractions intro

Review articles

Subtracting negative numbers review

Intro to subtracting negative numbers

Equivalent fractions review

Equivalent fractions

Dividing fractions review

Dividing fractions by fractions

Dividing negative numbers review

Multiplying & dividing negative numbers

Multiplying negative numbers review

Multiplying & dividing negative numbers

Get Started
Basic addition and subtraction

Adding and subtracting is the basis of all mathematics. This tutorial introduces you to one-digit addition and subtraction.

Community questions