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Web-based Practice

Adding Fractions by NLVM


Math, Science & Technology

Grade Levels

Intermediate, 5th Grade

Virtual Manipulative

Click here for this interactive resource.

Content Provider

The National Library of Virtual Manipulatives is a three-year NSF supported project to develop a library of uniquely interactive, web-based virtual manipulatives or concept tutorials, mostly in the form of Java applets, for mathematics instruction (K-8 emphasis). The project includes dissemination and extensive internal and external evaluation. For more information, please visit http://nlvm.usu.edu/en/nav/vlibrary.html.


This interactive web-based manipulative illustrates the two-step process of adding proper fractions. The first step in adding fractions is to identify a common group name (denominator). Finding a common group name means separating two (or more) whole groups into the same number of parts.


Principal Investigators
Larry Cannon
Jim Dorward
Bob Heal
Leo Edwards

Java Applet Programming
Ethy Cannon
Joel Duffin
David Stowell
Zeke Susman
Richard Wellman
Jennifer Youngberg

Web Site Programming
Joel Duffin

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