把頭算以身當五目視四方
把頭算以身當五目視四方
把頭之法，别須算二枚。一漫一齒者，一面刻爲一，其一面爲二；一而爲三，其一靣爲匹也。漫者爲把爲猶即當五算。生齒者為把頭，自當一算。故曰以身當五，目視四方也。
End of chapter
Text and scans: Shidian Guji (Peking University – ByteDance open ancient texts). Edition details are given per book. Shidian Guji
數術紀遺
把頭算以身當五目視四方
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