5/9-1/25+4/9-4/25=?简便计算
问题描述:
5/9-1/25+4/9-4/25=?简便计算
答
5/9-1/25+4/9-4/25=(5/9+4/9)-(1/25+4/25)
=1-1/5
=4/5
答
5/9-1/25+4/9-4/25
=5/9+4/9-1/25-4/25
=1-1/5
=4/5
答
5/9-1/25+4/9-4/25
=(5/9+4/9)-(1/25+4/25)
=1-1/5
=4/5