简便计算 2005×0.375-0.375×1949+3.75×2.4

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简便计算2005×0.375-0.375×1949+3.75×2.4简便计算2005×0.375-0.375×1949+3.75×2.4简便计算2005×0.375-0.375×1949+3.75×2

简便计算 2005×0.375-0.375×1949+3.75×2.4
简便计算
2005×0.375-0.375×1949+3.75×2.4

简便计算 2005×0.375-0.375×1949+3.75×2.4
2005×0.375-0.375×1949+0.375×24 =0.375×(2005-1949+24)=0.375×80=30

2005*-0.375*1949+3.75*2.4=(2005-1949+24)*0.375=80*0.375=30

用计算器算

原式=0.375X(2005-1949加24)=0.375X32=0.375X4X4X2=9

140.16

2005×0.375-0.375×1949+3.75×2.4=2005×0375-1949×0.375+24×0.375=(2005-1949+24)×0.375=80×0.375=80×3/8=30