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先从两则故事谈起。【故事1】“厉害”的研究生朋友这是一个我亲身经历的故事。朋友在武汉某高校读研,数学相当棒。相邀洪山广场,问及“小学数学有什么可教的”。我随即出了三道题。一问:估计卖冷饮的小店高多少。本来刚过2米的高度硬是被他估计成至少3米。再问:估计(广场的)一块砖多大面积。不足0.5平方米的大理石砖被估计成了近0.8平方米。还问:手中矿泉水瓶能装多少水?600毫
Start with two stories. [Story 1] “amazing ” graduate friend This is a story I have experienced. Friends of a university in Wuhan, research, mathematics is quite good. Invited Hongshan Square, asked “What can be taught in elementary mathematics ”. I immediately made three questions. A question: Estimated selling cold store how much higher. He had just passed the height of 2 meters was he estimated to be at least 3 meters. Ask again: Estimating (square) how much a brick. Marble tiles of less than 0.5 square meter are estimated to be nearly 0.8 square meters. Also asked: How much water can be in the hands of mineral water bottles?