1.28X6.1-61X0.028的简便方法?
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1.28*6.1-61*0.028
=1.28*6.1-6.1*0.28
=6.1*(1.28-0.28)
=6.1*1
=6.1
=1.28*6.1-6.1*0.28
=6.1*(1.28-0.28)
=6.1*1
=6.1
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展开全部
1.28×6.1-61×0.028
=1.28×6.1-6.1×0.28
=6.1×(1.28-0.28)
=6.1
=1.28×6.1-6.1×0.28
=6.1×(1.28-0.28)
=6.1
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