3.5×0.25×1.4怎样简便运算
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3.5×0.25×1.4
=3.5*0.25*2*0.7
=3.5*0.5*0.7
=3.5*0.35
=3.5^2/10
=12.25/10
=1.225
=3.5*0.25*2*0.7
=3.5*0.5*0.7
=3.5*0.35
=3.5^2/10
=12.25/10
=1.225
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