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Quick instructions If your browser is not JavaScript capable you can display the applet clicking on the link: THE APPLET Each of the two white rectangles in the panel of this applet represents one unit. A selection of a number from the upper choice box divides the upper wide rectangle into that number of equal parts. Clicking on the upper "DIV" button changes its label to "FRA" and allows you to select a certain number of the consecutive equal parts. This selection is done by clicking on one of the parts there. Then all preceding parts and the part clicked upon are colored (cyan). These colored parts constitute a certain fraction of the whole unit. Simultaneously this fraction is formally recorded on the small blackboard. If the selected fraction can be simplified (reduced), the simplified notation of it is also displayed. In the same way another fraction in the lower vide rectangle can be constructed. Its color will be light green. If you want to change the selected fractions just click on another part of selected rectangle. To change the current partition click on the proper "FRA" button and make a new selection. To start a new fraction addition or subtraction problem use the "RESET" button at any time.
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