Abacus is a useful learning piece of equipment for the visually impaired, as well as for anyone who wants to learn the origins of a modern calculator.
Just by moving the beads from left to right, you can add up to a billion or more.
Abacus is a tool that can be used to calculate - Add, Subtract, Multiply & divide, apart from being able to do other arithmetic functions and Brain activation.
Негізгі бет Place Value,Face Value,Expanded Form,Add & Subtract By Abacus Beads & Rods
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