急0.720.58+0.280.38=?简便计算

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：2024/05/01 10:20:25

急0.72*0.58+0.28*0.38=?简便计算

0.72*0.58+0.28*0.38
=(1-0.28)*0.58+0.28*0.38
=0.58-0.28*0.58+0.28*0.38
=0.58-0.28*(0.58-0.38)
=0.58-0.28*0.2
=0.58-0.056
=0.524

急0.72*0.58+0.28*0.38=?简便计算 490/35=?是简便计算急! 简便计算急.练习题的简便计算, 简便计算,一道数学题,急, 数学简便计算---超急 102.31×59 简便计算急简便计算：43*67+33*33-7=?急, (1/5-1/51)x17x5=?简便计算急!11 0.28*0.72+0.72*0.72简便计算用简便计算：8.7*0.72+0.28*8.7 19.28+7.77+0.72= 简便计算 54.9×0.38简便计算