计算(1)9.8*65.2*1.25-12.5*0.625*18 (2)

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计算(1)9.8*65.2*1.25-12.5*0.625*18 (2)
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计算(1)9.8*65.2*1.25-12.5*0.625*18 (2)
计算(1)9.8*65.2*1.25-12.5*0.625*18 (2)

计算(1)9.8*65.2*1.25-12.5*0.625*18 (2)
9.8*65.2*1.25-12.5*0.625*18
9.8*62.5*1.25-12.5*0.625*18 =12.5*(6.25*(9.8-1.8))=12.5*6.25*8=12.5*50=625

9.8*62.5*1.25-12.5*0.625*18
=9.8*6.25*12.5-12.5*0.625*18
=12.5*(9.8*6.25-6.25*1.8)
=12.5*6.25*8
=12.5*8*6.25
=100*6.25
=625

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