8.15*158+67.6*18.5+81.5*51.8=?
问题描述:
8.15*158+67.6*18.5+81.5*51.8=?
答
=8.15(158+518)+67.6*18.5
=8.15*676+67.6*18.5
=676(8.15+1.85)=6760