第1个回答 推荐于2016-05-14
41.2×8.1+11×1.25+53.7×1.9
=41.2×8.1+1.1×12.5+41.2×1.9+12.5×1.9
=41.2×（8.1+1.9）+（1.1+1.9）×12.5
=41.2×10+3×12.5
=412+37.5
=449.5本回答被提问者和网友采纳
=41.2×8.1+1.1×12.5+41.2×1.9+12.5×1.9
=41.2×（8.1+1.9）+（1.1+1.9）×12.5
=41.2×10+3×12.5
=412+37.5
=449.5本回答被提问者和网友采纳
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