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自然数 来自维基百科,自由的百科全书
唐五代时期的敦煌算经残卷(P.3349)则将这个单位写作“讓(让)”,说“万万该曰梓”、“万万梓曰讓”,用现在通用的用字表示即万万垓为一秭、万万秭为一穰。也就是一让(穰)为1048。
穰的单位与上下数可参考下表。
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