问题描述: 1.25x1.6x0.9简便计算 五年级 1个回答 分类:数学 2019-09-19 问题解答: 我来补答 解法一: 1.25x1.6x0.9 =1.25x8x0.2x0.9 =10x0.2x0.9 =2x0.9 =1.8 解法二: 1.6×1.25x0.9 =4×0.4×1.25x0.9 =4×0.4×0.25×5x0.9 =20x0.1x0.9 =2x0.9 =1.8 展开全文阅读