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Arithmetic

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We’ve made improvements to this course!

We’ve recently made improvements to Arithmetic! We've added new exercises and videos to cover more subjects.
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Addition and subtraction

Basic addition and subtraction: Addition and subtractionAddition and subtraction within 20: Addition and subtractionStrategies for adding and subtracting within 100: Addition and subtractionAddition within 100: Addition and subtraction
Subtraction within 100: Addition and subtractionWord problems within 100: Addition and subtractionMulti-digit addition with regrouping: Addition and subtractionMulti-digit subtraction with regrouping: Addition and subtraction

Multiplication and division

Multiplication intro: Multiplication and divisionMultiplication by 10s, 100s, and 1000s: Multiplication and divisionMultiplication: place value and area models: Multiplication and divisionMulti-digit multiplication : Multiplication and divisionDivision intro: Multiplication and division
Division: place value and area: Multiplication and divisionMulti-digit division (no remainders): Multiplication and divisionRemainders: Multiplication and divisionMulti-digit division (remainders): Multiplication and divisionMultiplication and division word problems: Multiplication and division

Negative numbers

Intro to negative numbers: Negative numbersOrder negative numbers: Negative numbersNumber opposites: Negative numbersAbsolute value: Negative numbers
Intro to adding negative numbers: Negative numbersIntro to subtracting negative numbers: Negative numbersAdding & subtracting negative numbers: Negative numbersMultiplying & dividing negative numbers: Negative numbers

Fractions

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

Decimals

Intro to decimals: DecimalsDecimals on the number line: DecimalsRounding decimals: DecimalsComparing decimals: DecimalsRewriting decimals as fractions: Decimals
Adding decimals: DecimalsSubtracting decimals: DecimalsAdding and subtracting decimals word problems: DecimalsMultiplying decimals: DecimalsDividing decimals : Decimals
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