子日:“学而不思则罔,思而不学则殆.”可见,思考对于学习非常重要.下面看看李丙南同学的做法吧.一次做家庭作业时,我看到了一道题很奇妙,将一个三位数(或多位数)进行n次“F”运算,结果是什么?什么是“F”运算呢?“F”运算就是将一个三位数(或多位数)的各位数重新进行排列,并找出最大值和最小值,最后用最大值减去最小值.比如将123进行1次“F”运算就是321-123=198,但如果将123进行2 016次“F”运算,结果是什么呢? Sub day: “Learning without thinking is indiscriminate, thinking and not learning is perilous. ” Visible, thinking is very important for learning .Liban Li next to see the practice of it .Once homework, I saw a problem Fantastic, a three-digit (or multi-digit) n times “F ” operation, what is the result? What is the “F” operation? “F” operation is a three-digit Or multi-digit) of the digit rearrangement, and find the maximum and minimum value, and finally the maximum minus the minimum value. For example, 123 for a “F” operation is 321-123 = 198, but If the 123 for 2 016 times “F” operation, the result is what?