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Main content

3rd grade

Looking for Missions? Click here to start or continue working on the 3rd grade Mission.

We’ve updated this course!

We’ve recently made improvements to 3rd grade math! We’ve improved the scope and the structure to be better aligned to the spirit of the Common Core, and we've added content to cover more subjects! You are viewing the newer edition.

Learn more or access older edition

Intro to multiplication

Multiplication as equal groupsMultiplication on the number lineMultiplication as groups of objects

Multiplication with arraysMultiplication in contextsCommutative property of multiplication

1-digit multiplication

Multiply by 0 or 1Multiply by 2 or 4Multiply by 5 or 10

Multiply by 3 or 6Distributive propertyMultiply by 7, 8, or 91-digit multiplication

Addition, subtraction, and estimation

Rounding to nearest 10 or 100Estimate to add multi-digit numbersStrategies for adding two and three-digit numbersAdding with regrouping within 1000

Estimate to subtract multi-digit numbersStrategies for subtracting two and three-digit numbersSubtracting with regrouping within 1000Addition and subtraction missing value problemsAddition and subtraction word problems

Intro to division

Division introDivision in contextsRelating multiplication and divisionDivide by 1, 2, or 4

Divide by 5 or 10Divide by 3 or 6Divide by 7, 8, or 91-digit division

Understand fractions

Fractions introFractions in contextsWhat fractions mean

Fractions on the number lineFractions and whole numbers

Equivalent fractions and comparing fractions

Comparing fractionsComparing fractions of different wholesEquivalent fractions

More with multiplication and division

Letters and symbols in multiplication and division equationsMultiplication and division word problemsAssociative property of multiplication

Multiplying by tens

Arithmetic patterns and problem solving

2-step expressionsEstimation word problemsOne and two-step word problems

Patterns in arithmetic

Quadrilaterals

Area

Area introductionCount unit squares to find areaArea formula intuition

Multiply to find areaArea and the distributive propertyDecompose figures to find area

Perimeter

PerimeterPerimeter of polygons with missing side lengthsPerimeter word problems

Comparing area and perimeter

Time

Time on number lineTelling timeElapsed time

Measurement

Represent and interpret data

Picture graphsBar graphsLine plots with fractions

Community questions