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The initial layout for each side of the upper five beads on the beam, the beam under five on the other side of each beads by beam. Pieces can be stacked in one's own beads. The beam up stacked two beads, five beads up stacked beam. Each round of selection is one of the two movements, a bead on the side towards one's own a move.
A 5+1 suanpan appeared in the Ming dynasty, an illustration in a 1573 book on suanpan showed a suanpan with one bead on top and five beads at the bottom. The evident similarity of the Roman abacus to the Chinese one suggests that one may have inspired the other, as there is strong evidence of a trade relationship between the Roman Empire and China.
A suanpan (top) and a soroban (bottom). The two abaci seen here are of standard size and have thirteen rods each. Another variant of soroban. The soroban is composed of an odd number of columns or rods, each having beads: one separate bead having a value of five, called go-dama (五玉, ごだま, "five-bead") and four beads each having a value of one, called ichi-dama (一玉, いちだま ...
Zhusuan (Chinese: 珠算; pinyin: zhūsuàn; literally: "bead calculation") is the knowledge and practices of arithmetic calculation through the suanpan or Chinese abacus. In the year 2013, it has been inscribed on the UNESCO Representative List of the Intangible Cultural Heritage of Humanity.
All five of them are called 'lower beads'. But only the lowest one of that five beads is called the 'earth bead'. So the most top (heaven bead) and most bottom (earth) beads are not used during addition and subtraction. These two beads are used in the traditional Chinese method of multiplication and division.
Painted ceramic bowl with base, Lopburi 2300 BCE. Bang Chiang culture. The earliest trace of Thai ceramics ever recorded is the Ban Chiang, said to date back to about 3600 BCE and found in what is the present day Udon Thani Province, Thailand.
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