If the senior class has 360 students, of whom 5/12 are women, and the junior class has 350 students, of whom 4/7 are women, how many more women are there in the junior class than in the senior class? 答案是(5/12 *360)-(4/7 *350) 答案为什么是负数呢？为什么不是(4/7 *350) -(5/12 *360)
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发表于 2010-7-3 18:01:49
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