用简便方法计算下面各题 0.5*2.33*8 0.3*2.5*0.4

问题描述:

用简便方法计算下面各题 0.5*2.33*8 0.3*2.5*0.4
越简便越好,急用,

0.5*2.33*8 =0.5*8*2.33=4*2.33=9.32
0.3*2.5*0.4=0.3*1=0.3