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Note
學習方法請參考「學習三部曲」,講義下載:負數與數線.pdf
其他講解:絕對值1絕對值2絕對值3
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03-17 17:43, 小噹噹
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03-17 17:40, 小噹噹
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07-01 17:40, 柯柯
7825
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02-12 21:31, 黃德安
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