25+44-64+35怎么简便计算?
问题描述:
25+44-64+35怎么简便计算?
答
25+44-64+35=25+35+44-64=60+44-64=104-64=40
答
原式=(25+35)+(44-64)=60+(-20)=40
答
25+35-20=60-20=40
答
25+44-64+35
=(25+35)-(64-44)
=60-20
=40
答
收起 25+44-64+35
= 25+35 - (64-44)
= 60 - 20
= 40