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0.85x2.5+0.085x75 用简便方法运算
展开全部
0.85x2.5+0.085x75
=0.85x2.5+0.85x7.5
=0.85*(2.5+7.5)
=8.5
或
0.85x2.5+0.085x75
=0.085x25+0.085x75
=0.085*(25+75)
=8.5
=0.85x2.5+0.85x7.5
=0.85*(2.5+7.5)
=8.5
或
0.85x2.5+0.085x75
=0.085x25+0.085x75
=0.085*(25+75)
=8.5
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