54.9*0.38和4.05+37.85用简便方法

来源：学生作业帮编辑：拍题作业网作业帮分类：数学作业时间：2024/04/19 15:32:43

54.9x0.38=（55-0.1）×0.38=55×0.38-0.1×0.38=（50+5）×0.38-0.1×0.38=50x0.38+5x0.38-0.1x0.38=19+1.9-0.038=20.9-0.038=20.8624.05+37.85=41.9

54.9*0.38和4.05+37.85用简便方法 54.9×0.38用简便方法计算用简便方法和递等式计算：用递等式和简便方法计算 54.9*0.38= 4.05+37.85= 2.96*40= 简便方法计算, 用简便方法计算：用简便方法计算用简便方法算用简便方法啊解方程和用简便方法计算和分数计算 2.5*3.6和1.3/2.5用简便方法计算 2.6×9.98和0.032×2.5×1.25用简便方法计算