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左面是越南保禄县小学三年级的一道数学课外习题。要求按由上至下、从左到右的顺序,填入1至9的数字允许重复填写,按先乘除后加减的运算法则,完成看上去拐弯抹角的算式即可。题目要求很简单,可操作起来却一点也不简单,八九岁的小学生更是够呛。一经上网广为流传后,竟然难倒无数家长父母,甚至许多数学教师和博士都无计可施,此题真的如网友所言“太难了”吗?下面就来剖析一番:
On the left is a third-grade math extracurricular exercise at Paul County Elementary School in Vietnam. Requirements from top to bottom, from left to right order, fill in the numbers from 1 to 9 allows repeated filling, according to the first multiplication and division addition and subtraction algorithm, the completion of the calculation can look roundabout. Topic requirements are simple, but it is not easy to operate, 89-year-old primary is even more choke. Once the Internet is widely circulated, unexpectedly countless parents parents, and even many mathematics teachers and Ph.D. are doomed to this question really as the users said “too difficult ”? Here’s to analyze something: