👉 Learn how to add and subtract mixed numbers. Mixed numbers are numbers with two parts: the whole number part and the ...

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For many elementary teachers, fractions have traditionally sprung to mind lessons involving pizzas, pies, and chocolate bars, among other varieties of “wholes” that can be shared. But in what many ...

👉 Learn how to divide fractions. To divide two fractions, we multiply the first fraction by the reciprocal of the second ...

In this math lesson, students learn multiple ways to add fractions and about bar modeling. In this lesson, students learn multiple ways to add fractions and how bar modeling simplifies word problems.

There are some basic properties of numbers any 3rd grader can tell you: Each number is represented by a single symbol, and followed by a single successor. Multiplication makes a number bigger; ...

PhET Interactive Simulations at the University of Colorado Boulder provides free, research-based math and science simulations for all education levels. All simulations and resources are open source ...