
(0.04+0.8)×1.25简便方法?
1个回答
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(0.04+0.8)×1.25
=0.04×1.25+0.8×1.25
=0.04×(1+0.25)+1
=0.04×1+0.04×0.25+1
=0.04+0.01+1
=1.05
=0.04×1.25+0.8×1.25
=0.04×(1+0.25)+1
=0.04×1+0.04×0.25+1
=0.04+0.01+1
=1.05
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