Simulates an arithmetic rack with 10 beads per rod. Beads start on the left. One or two rods can be shown, as well as the total number of beads on each side of each rod, and the sum or difference of the beads on the left of the rods. Checkboxes allow users to hide the beads on the right side of each rod.
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Last modified: Friday, 8 May 2009, 10:40 AM