0.46*3.5*0.8怎样简便计算_数学解答

0.46*3.5*0.8怎样简便计算

人气：492 ℃　时间：2020-04-08 03:22:16

解答

=0.46*（0.5+3)*0.8
=(0.23+1.38)*0.8
=1.61*0.8
=(1.5+0.11)*0.8
=1.5*0.8+0.11*0.8
=1.2+0.088
=1.288