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No Plagiarism!qvmHw1Ui0MiUNrqBF2eUposted on PENANA 作品:速算8964 copyright protection300PENANAWM7obUOfMQ 維尼
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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 protection300PENANA6cLbA3h4Lz 維尼
封面那隻吉祥物其實是由math組成的!你發現了嗎?8964 copyright protection300PENANAstpDmphH5u 維尼
304Please respect copyright.PENANAJ9jglrWBy2
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多位數X一位數304Please respect copyright.PENANAOZ837tBYRo
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