问题描述: 简便计算(1) 5.23÷4-3.23×0.25 (2) 4.2×6.5÷1.3 1个回答 分类:数学 2014-10-02 问题解答: 我来补答 (1) 5.23÷4-3.23×0.25 =5.23×0.25-3.23×0.25 =(5.23-3.23)×0.25 =2×0.25 =0.5(2) 4.2×6.5÷1.3=4.2×5×1.3÷1.3=4.2×5=21 展开全文阅读