文友如蝶给我们讲述过这样一个故事:一天,上小学的女儿带回来一道数学题,一张大饼,只切三刀,最多可以切成几块?这样的习题历来难不到聪明的女儿,她只思考了一会答:七块。可是偏偏聪明女儿有个更聪明的爸爸,他说这还不是最多,最多应该是八块。方法是:两刀将饼切成四块后,将刀与饼水平从中间把饼分成上下两层。爸爸拿块泡沫板当作 Friends such as butterfly told us about such a story: one day, primary school daughter brought back a math problem, a pie, only cut three knives, up to a few can be cut? Such exercises have never difficult to clever daughter She only thought for a while: seven. However, there is a smarter dad smarter father, he said this is not the most, should be at most eight. The method is: After two knives cut the cake into four pieces, divide the cake into two levels from the middle of the knife and cake level. Dad took a piece of foam as a board