新舟机场扩建消息:简便算一算

来源:百度文库 编辑:神马品牌网 时间:2024/04/29 01:04:56
6.86×(-5)+6.86×(-12)+6.86×(+17)

=6.86*(-5-12+17)
=0

6.86×(-5)+6.86×(-12)+6.86×(+17)
=6.86×(-5-12+17)
=0

0