![]() ![]() In summary, for a blind person, using the abacus is just like using a pen and paper to work something out. The larger, 15-column design simply allows for the computation of lengthier equations. Two sizes are available both work equally well for solving math problems. Yes, the abacus method of solving arithmetic problems is the standard for blind students, and training for the same is offered in schools in lieu of sighted kids working out problems long-hand on paper. ![]() ![]() And underneath the beads is a firm, stiff foam backing, which prevents beads from sliding around on their own. By "recording" numbers on the abacus, then taking beads away or adding new ones, you're able to manipulate numbers independently and perform basic and complex calculations at the drop of a hat. Below this are four more beads, each of which represents a single 1 digit. At the top of each column is one single bead, which stands for 5. Using the abacus is perhaps far easier than it looks. Addition, subtraction, multiplication and division questions can all be performed on this nifty device - not to mention finding the square root of a number. Then, by simply taking away and adding beads to different columns, you can keep track of every step of the problem you're solving. This durable, plastic pocket-sized abacus has numerous columns of beads which allow you to "write down" your calculation. And of course, when you're still a kid in school, you're not supposed to use a calculator to do your math homework. Occasionally you won't want to disturb others around you by listening to your calculator out loud. Sometimes the batteries in your talking calculator will die suddenly. Product DescriptionWell, you know how it goes. ![]()
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