问题描述: 51.2×4.6+20×1又4分之1+63.7×5.4 简算 1个回答 分类:数学 2014-11-24 问题解答: 我来补答 51.2×4.6+20×1又4分之1+63.7×5.4 =51.2×4.6+20×1又4分之1+51.2×5.4 +12.5×5.4=51.2×(4.6+5.4)+25+67.5=51.2×10+92.5=512+92.5=604.5 展开全文阅读