题文
怎样简便就怎样算
16.4+3.5+83.6+166.5 
×38.3+2.7×0.8
498+9870÷35 420.5﹣294÷2.8×2.1．
怎样简便就怎样算
16.4+3.5+83.6+166.5 ×38.3+2.7×0.8
498+9870÷35 420.5﹣294÷2.8×2.1．
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