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《从“大豆榨油”说起》【《中小学数学》2014年5月上旬(小学)】一文中,由一道数学题“用4千克的大豆可以榨油1.6千克,照这样计算,1千克的大豆可以榨油多少千克?要榨1千克油需要多少千克大豆?”谈到两种解题方法(第一种:看问题最后求的是油还是大豆。求的是油,那就用油除以大豆;求的是大豆,那就用大豆除以油。第二种:看问题开头是怎么问的。问1千克大豆,那就把大豆作为除数,油作为被除数;问1千克油,那就把油作为除数,大豆作为被除数)时,我
From “” Soybean oil “Speaking ” [“primary and secondary mathematics” in early May 2014 (primary)] in a text, by a mathematical problem “with 4 kg of soybeans can be extracted 1.6 kg, according to this calculation , 1 kg of soybeans can squeeze how many kilograms? To squeeze 1 kg of oil how many kg of soybeans? ”Talking about two solutions to the problem (the first one: look at the end of the question is the oil or soy .Is the oil, Then the oil is divided by the soybean; seeking is the soybean, then the soybean is divided by the oil.Second: see the beginning of the question is how to ask.One kilogram of soybeans, then the soybean as the divisor, the oil as the dividend; 1 kg of oil, then put the oil as the divisor and the soy as the dividend) when I