The Chinese abacus, the oldest invention in China, is used for decimal calculations. Abacus is a form of manual calculation aid. It originated in China and is an important invention in ancient China. Before the emergence of Arabic numerals, the abacus was a widely used computational tool worldwide. Nowadays, abacuses continue to be used in some parts of Asia and the Middle East, especially in stores where they can be purchased from stores that supply Chinese and Japanese goods. In the West, it is sometimes used to help children understand numbers, and some mathematicians enjoy experiencing the feeling of using an abacus to solve simple arithmetic problems
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