6.83-(1.25+2.83)怎么简便计算?
问题描述:
6.83-(1.25+2.83)怎么简便计算?
答
6.83-(1.25+2.83)
=6.83-1.25-2.83
=6.83-2.83-1.25
=4-1.25
=2.75