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No Plagiarism!n1xfg74CSmV9MrhQWVGyposted on PENANA 作品:速算8964 copyright protection255PENANAqiAm5n3F91 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 protection255PENANADNlVvkQ5XB 維尼
封面那隻吉祥物其實是由math組成的!你發現了嗎?8964 copyright protection255PENANA6g5npcCxU3 維尼
259Please respect copyright.PENANA8BaRXVbNin
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多位數X一位數259Please respect copyright.PENANAvMjRwj4IvN
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