(-47.65)*2 6/11+(-37.5)*(-2 6/11)+10.5*(-7 5/11)简便运算

问题描述:

(-47.65)*2 6/11+(-37.5)*(-2 6/11)+10.5*(-7 5/11)
简便运算

(-47.65)*2又6/11+(-37.15)*(-2又6/11)+10.5*(-7又5/11)
=2又6/11×(37.15-47.65)+10.5*(-7又5/11)
=-10.5*(2又6/11+7又5/11)
=-10.5*10=-105