简便计算:7.5x2.3+1.9x2.5+12.5x0.4
问题描述:
简便计算:7.5x2.3+1.9x2.5+12.5x0.4
答
2.5*3*2.3+1.9*2.5+2.5*5*0.4=2.5*(6.9+1.9+2)=2.5*10.8=27
简便计算:7.5x2.3+1.9x2.5+12.5x0.4
2.5*3*2.3+1.9*2.5+2.5*5*0.4=2.5*(6.9+1.9+2)=2.5*10.8=27