简便运算怎么写啊? 日期:2016-09-15 08:49:02 人气:1 简便运算怎么写啊? 7.2x0.2+2.4x1.4 =2.4x0.6+2.4x1.4 =2.4x(0.6+1.4) =2.4x2 =4.8