简便运算:9.8*62.5*1.25-12.5*0.625*18
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简便运算:9.8*62.5*1.25-12.5*0.625*18
简便运算:9.8*62.5*1.25-12.5*0.625*18
简便运算:9.8*62.5*1.25-12.5*0.625*18
9.8*62.5*1.25-12.5*0.625*18
=9.8*62.5*1.25-1.25*62.5*1.8
=62.5*1.25*(9.8-1.8)
=62.5*1.25*8
=62.5*10
=625
9.8*62.5*1.25-12.5*0.625*18
=9.8*62.5*1.25-1.25*62.5*1.8
=(9.8-1.8)*62.5*1.25
=8*1.25*62.5
=10*62.5
=625