急!数学题,给30分!!!
(-47.65)*2又6/11+(-37.15)*(-2又6/11)+10.5*(-7又5/11)简便计算...
(-47.65)*2又6/11+(-37.15)*(-2又6/11)+10.5*(-7又5/11)
简便计算 展开
简便计算 展开
2010-10-06
展开全部
(-47.65)*2又6/11+(-37.15)*(-2又6/11)+10.5*(-7又5/11)
=(-47.65)*2又6/11+(37.15)*(2又6/11)+10.5*(-7又5/11)
=(-47.65+37.15)*(2又6/11)+10.5*(-7又5/11)
=-10.5*(2又6/11)+10.5*(-7又5/11)
=-10.5*(2又6/11+7又5/11)
=-10.5*10
=-105
=(-47.65)*2又6/11+(37.15)*(2又6/11)+10.5*(-7又5/11)
=(-47.65+37.15)*(2又6/11)+10.5*(-7又5/11)
=-10.5*(2又6/11)+10.5*(-7又5/11)
=-10.5*(2又6/11+7又5/11)
=-10.5*10
=-105
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询