400.6*7-2003*0.4 简便计算 *=乘法
问题描述:
400.6*7-2003*0.4 简便计算 *=乘法
答
=(400.6 / 0.2)*(7*0.2)-2003*0.4 =2003*1.4-2003*0.4 =2003*(1.4-0.4) =2003*1 =2003
400.6*7-2003*0.4 简便计算 *=乘法
=(400.6 / 0.2)*(7*0.2)-2003*0.4 =2003*1.4-2003*0.4 =2003*(1.4-0.4) =2003*1 =2003