一件工作.甲队做2天,乙队做5天,共完成4/15;甲5天,乙2天,共完成19/60,问甲、乙两队单独做各需要多少(19/60-4/15)÷3 = 1/60 (19/60+4/15)÷7=1/12 (1/12+1/60)÷2 = 1/20 (1/12-1/60)÷2 = 1/30 甲
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/18 22:47:30
![一件工作.甲队做2天,乙队做5天,共完成4/15;甲5天,乙2天,共完成19/60,问甲、乙两队单独做各需要多少(19/60-4/15)÷3 = 1/60 (19/60+4/15)÷7=1/12 (1/12+1/60)÷2 = 1/20 (1/12-1/60)÷2 = 1/30 甲](/uploads/image/z/11982911-23-1.jpg?t=%E4%B8%80%E4%BB%B6%E5%B7%A5%E4%BD%9C.%E7%94%B2%E9%98%9F%E5%81%9A2%E5%A4%A9%2C%E4%B9%99%E9%98%9F%E5%81%9A5%E5%A4%A9%2C%E5%85%B1%E5%AE%8C%E6%88%904%2F15%EF%BC%9B%E7%94%B25%E5%A4%A9%2C%E4%B9%992%E5%A4%A9%2C%E5%85%B1%E5%AE%8C%E6%88%9019%2F60%2C%E9%97%AE%E7%94%B2%E3%80%81%E4%B9%99%E4%B8%A4%E9%98%9F%E5%8D%95%E7%8B%AC%E5%81%9A%E5%90%84%E9%9C%80%E8%A6%81%E5%A4%9A%E5%B0%91%2819%2F60-4%2F15%29%C3%B73+%3D+1%2F60%E3%80%80%E3%80%80%2819%2F60%2B4%2F15%29%C3%B77%3D1%2F12%E3%80%80%E3%80%80%EF%BC%881%2F12%2B1%2F60%EF%BC%89%C3%B72+%3D+1%2F20%E3%80%80%E3%80%80%EF%BC%881%2F12-1%2F60%EF%BC%89%C3%B72+%3D+1%2F30%E3%80%80%E3%80%80%E7%94%B2)
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