学帮网13又4/19+86又15/19*0.25+0.625*86又15/19+86又15/19*0.125
来源：学生作业学帮网 编辑：学帮网 时间：2024/06/16 13:14:29
13又4/19+86又15/19*0.25+0.625*86又15/19+86又15/19*0.125
13又4/19+86又15/19*0.25+0.625*86又15/19+86又15/19*0.125
=13又4/19+86又15/19*(0.25+0.625+0.125)
=13又4/19+86又15/19
=100
13又4/19+86又15/19*0.25+0.625*86又15/19+86又15/19*0.125
=13又4/19+86又15/19*（0.25+0.625+0.125）
=13又4/19+86又15/19
=100