简便计算:1240x8.4+1.24x2300+12.4x430
问题描述:
简便计算:1240x8.4+1.24x2300+12.4x430
答
原式 = 1240*8.4+1240*2.3+1240*4.3
=1240*(8.4+2.3+4.3)
=1240*15
=18600