
1.75×34.5+27.5×30.25+5.5×34.25怎么简便?
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1.75×34.5+27.5×30.25+5.5×34.25
=1.75×34.5+5.5×5×30.25+5.5×34.25
=1.75×34.5+5.5×(151.25+34.25)
=1.75×34.5+5.5×185.5
=1.75×34.5+5.5×5×30.25+5.5×34.25
=1.75×34.5+5.5×(151.25+34.25)
=1.75×34.5+5.5×185.5
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