Adding Fractions - Illustrates with pictures finding the common denominator.
Fractions - Rectangle Multiplication – Visualize and practice multiplying fractions using an area representation (scroll down the page once you get there, to find the link).
Fractions Tutorials - High-quality fractions tutorials (scroll down the page about half way)
MathSplat - Click on the right answer to addition problems or the bug splats on your windshield!
Who wants pizza? - Explains the concept of fraction, addition and multiplication with an pizza example, then has some interactive exercises.
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