3.2*2.5简便方法=【()-()】*2.5
问题描述:
3.2*2.5简便方法=【()-()】*2.5
答
=【4-0.8】x2.5
=10-2
=8
3.2*2.5简便方法=【()-()】*2.5
=【4-0.8】x2.5
=10-2
=8