例如..
1-x抽正負數..點解會變左做-(x-1)
1抽負出黎..變負..
x抽負出黎..變正..
抽出黎ge負..負負得正..
點解會變左做-(x-1)
而5係(x-1)
收錄日期: 2021-04-12 20:34:26
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061203000051KK01099