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No Plagiarism!N9tY5mVUqRLLBLucAW0Oposted on PENANA 作品:速算8964 copyright protection215PENANAMi5GjoVS4s 維尼
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連結:https://www.penana.com/story/152194/%E9%80%9F%E7%AE%978964 copyright protection215PENANApsdOmGAIp2 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 protection215PENANA9ToM829EvK 維尼
封面那隻吉祥物其實是由math組成的!你發現了嗎?8964 copyright protection215PENANA5fhAsgFqXI 維尼
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多位數X一位數219Please respect copyright.PENANAuOXFW53rqN
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