-[+2.5]
=-2.5
-[+(-2又5分之1]
=-(-2又5分之1)
=2又5分之1
-[+2.5] 化簡(jiǎn) -[+(-2又5分之1]
-[+2.5] 化簡(jiǎn) -[+(-2又5分之1]
數(shù)學(xué)人氣：108 ℃時(shí)間：2020-03-17 16:43:31
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