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假日里或课余时间经常看到小朋友拿着扑克牌比赛“算二十四”,就是任意拿出四张牌来进行加减乘除,不管次序如何,也可以用括号,每张牌只能用一次,其中J、Q、K分别代表11、12、13三个数,谁先算出二十四,谁就胜利;如果不能算得二十四的,谁先判断出谁就胜利。如4、5、7、K四张牌就有(13-5)×(7-4)=24;又如1、9、1、1四张牌是不能算得二十四的。这个游戏目前在儿童中颇为流行。我发现不少小朋友算得又快又好,成人与老师往往也算不过他们。小朋
Often see the children in the holidays or in spare time playing poker game “count twenty-four” is to arbitrarily take out four cards for addition, subtraction, multiplication and division, regardless of the order can also be used in brackets, each card can only be used once , Of which J, Q, K, respectively, on behalf of the 11,12,13 three numbers, who first count twenty-four, who won; if you can not count twenty-four, who first determine who wins. Such as 4,5,7, K four cards have (13-5) × (7-4) = 24; another example, 1,9,1,1 four cards can not count twenty-four. This game is currently quite popular among children. I found that many children are considered fast and good, adults and teachers often count them. Small Peng