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6.25×0.56+0.347×3.4+5×0.125用简便方法计算

6.25×0.56+0.347×3.4+5×0.125 =0.625×5.6+0.625×1+0.347×3.4 =0.625×(5.6+1)+0.347×3.4 =0.625×6.6+(0.625-0.278)×3.4 =0.625×6.6+0.625×3.4-0.278×3.4 =0.625×(6.6+3.4)-0.278×3.4 =6.25-(0.278×3+0.278×0.4) =6.25-(0.834+0.1112) =6.25-0.94...

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