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Number & Operations (Grades Pre-K - 2)

Virtual manipulatives for Number & Operations, grades Pre-K - 2.

Bar Chart icon Bar Chart – Create a bar chart showing quantities or percentages by labeling columns and clicking on values.
Base Blocks icon Base Blocks – Illustrate addition and subtraction in a variety of bases.
Base Blocks Addition icon Base Blocks Addition – Use base ten blocks to model grouping in addition.
Base Blocks Decimals icon Base Blocks Decimals – Add and subtract decimal values using base blocks.
Base Blocks Subtraction icon Base Blocks Subtraction – Use base ten blocks to model separation of groups in subtraction.
Chip Abacus icon Chip Abacus – Learn about carrying and digits using chips.
Circle 99 icon Circle 99 – A puzzle involving adding positive and negative integers to sum to ninety nine.
Color Chips - Addition icon Color Chips - Addition – Use color chips to illustrate addition of integers.
Color Patterns icon Color Patterns – Arrange colors to complete a pattern.
Diffy icon Diffy – Solve an interesting puzzle involving the differences of given numbers.
Fraction Bars icon Fraction Bars – Learn about fractions using fraction bars.
Fractions - Naming icon Fractions - Naming – Write the fraction corresponding to the highlighted portion of a shape.
Fractions - Parts of a Whole icon Fractions - Parts of a Whole – Relates parts of a whole unit to written description and fraction.
Fractions - Visualizing icon Fractions - Visualizing – Illustrate a fraction by dividing a shape and highlighting the appropriate parts.
Hundreds Chart icon Hundreds Chart – Practice counting and visualize number patterns using a hundreds chart.
Mastermind icon Mastermind – Use inference and logic to play a game and guess a hidden pattern of pegs.
Money icon Money – Learn about money by counting and making change.
Number Line Arithmetic icon Number Line Arithmetic – Illustrates arithmetic operations using a number line.
Number Line Bars icon Number Line Bars – Use bars to show addition, subtraction, multiplication, and division on a number line.
Number Line Bars - Fractions icon Number Line Bars - Fractions – Divide fractions using number line bars.
Number Line Bounce icon Number Line Bounce – Number line addition and subtraction game.
Number Patterns icon Number Patterns – Discover the pattern and complete a sequence of numbers.
Percentages icon Percentages – Discover relationships between fractions, percents, and decimals.
Pie Chart icon Pie Chart – Explore percentages and fractions using pie charts.
Place Value Number Line icon Place Value Number Line – Explore place value by placing dots on number lines.
Rectangle Division icon Rectangle Division – Visualize and practice dividing numbers by using an area representation.
Rectangle Multiplication icon Rectangle Multiplication – Visualize the multiplication of two numbers as an area.
Rectangle Multiplication of Integers icon Rectangle Multiplication of Integers – Visualize and practice multiplying integers using an area representation.
Sieve of Eratosthenes icon Sieve of Eratosthenes – Relate number patterns with visual patterns.
Spinners icon Spinners – Work with spinners to learn about numbers and probabilities.
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