(78.6-0.786/25+75%/21.4)*15/2011

来源：学生作业帮编辑：作业帮分类：数学作业时间：2024/05/17 06:32:50

(78.6-0.786*25+75%*21.4)/15*2011
=（78.6-78.6x0.25+0.75x21.4）÷15x2011
=[78.6x(1-0.25)+0.75x21.4]÷15x2011
=(78.6x0.75+0.75x21.4)÷15x2011
=0.75x(78.6+21.4)÷15x2011
=0.75x100÷15x2011
=5x2011
=10055

(78.6-0.786/25+75%/21.4)*15/2011 (78.6-0.786*25+75%*21.4)/15*20的简算（78.6-0.786×25十75%×21.4）÷15×2011=______． 78.6—0.786*25+75%*21.4 (78.6-0.786*25+0.75*21.4)/15*1997 (78.6-0.786*25+0.75*21.4)/15*1999 简便运算（78.6—0.786×25+75%×21.4）÷15×2001 .（78.6—0.786×25+75%×21.4）÷15×2001= (78.6——0.786乘以25+75%乘以21.4）除以15乘2001 （1）（78.6－0.786×25＋75%×21.4）÷15×2001 （78.6-0.786×25+75%×21.4）÷15×1997=______． 78.6-0.786*25+0.75*21.4