用简便方法计算:0.25*39*0.25

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用简便方法计算:0.25*39*0.25用简便方法计算:0.25*39*0.25用简便方法计算:0.25*39*0.250.25×39+0.25=1/4×(39+1)=0.25×40=100.25×3

用简便方法计算:0.25*39*0.25
用简便方法计算:0.25*39*0.25

用简便方法计算:0.25*39*0.25
0.25×39+0.25
=1/4×(39+1)
=0.25×40
=10
0.25×39×0.25
=1/4×1/4×39
=1/16×39
=39/16