12.5*64*2.5*0.5=?(用简便方法计算)
问题描述:
12.5*64*2.5*0.5=?(用简便方法计算)
答
12.5*64*2.5*0.5
=12.5*(8*4*2)*2.5*0.5
=(12.5*8)*(2.5*4)*(0.5*2)
=100*10*1
=1000