数学题 六年级数奥小明买了47册练习本,每册价钱分别是1.40元、0.6元、0.4元,共付42.40元.他买每册0.6元的练习本是买0.4元的练习本的两倍,每种练习本各买了多少册?具体说一下解方程的过程
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![数学题 六年级数奥小明买了47册练习本,每册价钱分别是1.40元、0.6元、0.4元,共付42.40元.他买每册0.6元的练习本是买0.4元的练习本的两倍,每种练习本各买了多少册?具体说一下解方程的过程](/uploads/image/z/220379-59-9.jpg?t=%E6%95%B0%E5%AD%A6%E9%A2%98+%E5%85%AD%E5%B9%B4%E7%BA%A7%E6%95%B0%E5%A5%A5%E5%B0%8F%E6%98%8E%E4%B9%B0%E4%BA%8647%E5%86%8C%E7%BB%83%E4%B9%A0%E6%9C%AC%2C%E6%AF%8F%E5%86%8C%E4%BB%B7%E9%92%B1%E5%88%86%E5%88%AB%E6%98%AF1.40%E5%85%83%E3%80%810.6%E5%85%83%E3%80%810.4%E5%85%83%2C%E5%85%B1%E4%BB%9842.40%E5%85%83.%E4%BB%96%E4%B9%B0%E6%AF%8F%E5%86%8C0.6%E5%85%83%E7%9A%84%E7%BB%83%E4%B9%A0%E6%9C%AC%E6%98%AF%E4%B9%B00.4%E5%85%83%E7%9A%84%E7%BB%83%E4%B9%A0%E6%9C%AC%E7%9A%84%E4%B8%A4%E5%80%8D%2C%E6%AF%8F%E7%A7%8D%E7%BB%83%E4%B9%A0%E6%9C%AC%E5%90%84%E4%B9%B0%E4%BA%86%E5%A4%9A%E5%B0%91%E5%86%8C%3F%E5%85%B7%E4%BD%93%E8%AF%B4%E4%B8%80%E4%B8%8B%E8%A7%A3%E6%96%B9%E7%A8%8B%E7%9A%84%E8%BF%87%E7%A8%8B)
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