好簡單既問題一條
回答 (3)
2007-09-02 1:10 am
2-(-10)
=2+10-->因為(-)(-)得(+)
=12
=2+10-->因為(-)(-)得(+)
=12
2007-09-02 1:05 am
2-(-10)=12~~
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070901000051KK03366