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مقارنة بين المعداد الهندي
والمعداد القديم
Error free calculation
العداد القديم
Beads and background are of close colours (Brown and Black) and there is no differentiation.
العداد الهندي
Sliders are chosen to hide and unhide the colour images (Red and Green) displayed for specific values. Visualization and image memory are 100%.
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