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又到思维拓展课了,老师在黑板上出了一道选择题:一根绳子,第一次用去1/4,第二次用去1/4米.哪一次用去的长?A.第一次用去的多一些B.第二次用去的多一些C.两次用去的一样多D.无法确定一拿到题目,小亮就站起来大声说:“我选B,因为题中说‘第一次用去1/4’,那就说明第二次用去3/4,很明显,第二次用去的多。”听了他的回答,我的脑子开始飞快运转起来,他说得不是没有道理,可我总感觉有什么不对的地方,经过反复地读题,我恍然大悟,站起来反驳小亮:“题目中并没有告诉我们两次就把这一根绳子用完了,因此我们无法判断第二次的长短。假设这根绳子长1米,那么两次用去的同样多;假设这根绳子的长度小于1米,那
To thinking to expand the class, the teacher out on the blackboard a multiple choice: a rope, the first used to 1/4, the second used to 1/4 m. Which used to go? A. Use more time to go to the second use of more C. twice to go to the same number of D. can not be sure to get the title, small light stand up and loudly said: ”I choose B, because The question says ’for the first time to 1/4’, it means that the second time spent 3/4, obviously, the second time spent more. “” After listening to his answer, my mind began to fly fast In fact, he said it was not without reason, but I always feel something wrong, after repeated reading questions, I suddenly realized, stood up and refuted Xiaoliang: "The title did not tell us put this one twice The rope runs out, so we can not judge the length of the second. Assuming that the rope is 1 meter long, the same amount is used twice; assuming that the length of the rope is less than 1 meter, then