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No Plagiarism!IODXJEkBKbYune5Tv7Vwposted on PENANA 作品:速算8964 copyright protection183PENANABMHkFMdc9B 維尼
作者:MR.writer8964 copyright protection183PENANA3m3SIepsrm 維尼
連結:https://www.penana.com/story/152194/%E9%80%9F%E7%AE%978964 copyright protection183PENANA9KHjNSnHDb 維尼
這不是數學,只是單純的速算,本人會盡量用最簡單易懂的方式讓你了解。8964 copyright protection183PENANAM3zqJ6RQrh 維尼
封面那隻吉祥物其實是由math組成的!你發現了嗎?8964 copyright protection183PENANAAjoM4Ojz1V 維尼
187Please respect copyright.PENANAVvojiLyCNR
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兩位數X118964 copyright protection183PENANALMmG7ghA81 維尼
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多位數X一位數187Please respect copyright.PENANAvjNlJPYkPC
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