643*0.83+357*0.83 2.5*32*0.125
问题描述:
643*0.83+357*0.83 2.5*32*0.125
简便计算
答
643*0.83+357*0.83
=(643+357)*0.83
=1000*0.83
=830
2.5*32*0.125
=2.5*4*8*0.125
=10*1
=10