# 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!Fractions intro: FractionsFractions on the number line: FractionsEquivalent fractions: FractionsComparing fractions: FractionsCommon denominators: FractionsDecomposing fractions: FractionsAdding and subtracting fractions with like denominators: FractionsMixed numbers: FractionsAdding and subtracting fractions with unlike denominators: FractionsAdding and subtracting mixed number with unlike denominators: Fractions

Adding and subtracting fractions word problems: FractionsMultiplying whole numbers and fractions: FractionsMultiplication as scaling: FractionsMultiplying fractions: FractionsMultiplying mixed numbers: FractionsMultiplying fractions word problems: FractionsFractions as division: FractionsDividing unit fractions and whole numbers: FractionsDividing fractions by fractions: FractionsDividing fractions word problems: Fractions

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## Get StartedBasic addition and subtraction

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

Start learning: Basic addition and subtraction