Warning: All Applets are in Cinderella, dynamic geometry and physics simulation software, which can be obtained free from Cinderella.de.
.html files may be able to be opened in a java-enabled browser such as Safari or Firefox
See also Structured Variation Grids (SVGs)
Displaying Fractions arithmetic as operators on rectangles
The applet has two modes:
Choosing cells and displaying the corresponding fraction operator
Choosing fraction operators and seeing them instantiated as actions on a grid.
The arithmetic can be multiplication, addition or subtraction.
Notes on Applet use