8.4+3.5-8.4+3.5
=(8.4-8.4)+3.5+3.5
=0+3.5+3.5
=3.5+3.5
=7
8.4+3.5-8.4+3.5脫式計(jì)算.
8.4+3.5-8.4+3.5脫式計(jì)算.
數(shù)學(xué)人氣：798 ℃時(shí)間：2020-06-04 19:21:58
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