作业帮13又4/19+86又15/19*0.25+0.625*86又15/19+86又15/19*0.125
来源：学生作业帮助网 编辑：作业帮 时间：2024/12/03 12:30:07
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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*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