45.76-(12.8+1.76)-7.2 (简便计算)
问题描述:
45.76-(12.8+1.76)-7.2 (简便计算)
答
=45.76-12.8-1.16-7.2=45.76-1.16-(12.8+7.2)
=44.6-20
=24.6错的吧!