(78.6-0.786×2.5＋0.75×21.4)÷15×1997=?

来源：学生作业帮编辑：拍题作业网作业帮分类：数学作业时间：2024/05/20 08:54:25

(78.6-0.786×2.5＋0.75×21.4)÷15×1997
=（393/5-393/500*5/2+3/4*107/5）/15*1997
=（393/5-393/200+321/20）/15*1997
=（393/5+2817/200）/15*1997
=18537/200/15*1997
=12339.463

(78.6-0.786×2.5＋0.75×21.4)÷15×1997=? (78.6-0.786*25+0.75*21.4)/15*1997 （78.6-0.786×25+75%×21.4）÷15×1997=______． (78.6-0.786*25+0.75*21.4)/15*1999 78.6-0.786*25+0.75*21.4 （78.6-0.786*25+0.75*21.4)除15*2001 简算(78.6-0.786*25+0.75*21.4)/15*2003 （1）（78.6－0.786×25＋75%×21.4）÷15×2001 （78.6-0.786×25十75%×21.4）÷15×2011=______． .（78.6—0.786×25+75%×21.4）÷15×2001= (78.6-0.786/25+75%/21.4)*15/2011 (78.6-0.786*25+75%*21.4)*1997 如何计算?