简便计算 0.8×0.25×0.4×12.5 = = =

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简便计算 0.8×0.25×0.4×12.5 = = =
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简便计算 0.8×0.25×0.4×12.5 = = =
简便计算 0.8×0.25×0.4×12.5 = = =

简便计算 0.8×0.25×0.4×12.5 = = =
(0.8x12.5)x(0.25x0.4)

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(0.8*1.25)*(0.4*0.25)=0.1

(0.25x0.4)x(12.5x0.8)=0.1x10=1

(0.8x12.5)x(0.4x0.25)=0.3