File:Using-an-Abacus-09.png
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![File:Using-an-Abacus-09.png](https://upload.wikimedia.org/wikipedia/commons/thumb/3/3e/Using-an-Abacus-09.png/513px-Using-an-Abacus-09.png?20210914051233)
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Primitive and modern 4+1 abaci.
Summary
[edit]DescriptionUsing-an-Abacus-09.png |
English: A confusing phrase from the Shushu Jiyi (術數紀遺) by Xu Yue (徐岳), which perhaps dates from the 2nd century, is often quoted as describing a computing device that we could identify with an abacus and that has been interpreted in different ways as in the above figure (a). In this interpretation of a first Chinese abacus as a table abacus, the central part is divided into a series of columns with two parts; the upper one would assign a value of 5 to each bead and the lower one a value of 1, while the inactive (unused) beads wait scattered above and below the central part. |
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Author | Jccsvq |
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current | 05:12, 14 September 2021 | ![]() | 650 × 760 (44 KB) | Jccsvq (talk | contribs) | Uploaded own work with UploadWizard |
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File change date and time | 08:17, 6 September 2021 |
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