Compared with the lively scene at the beginning of junior high school last year, the number of participants in senior one dropped sharply this year, and the scene was quite deserted. Every year, the test questions in the Spring Festival Cup are quite good, and there is no charge. Why doesn't everyone want to participate? I have some different ideas about this.

Let's talk about the last question in the final exam last semester, Haidian Junior One Mathematics Examination Paper. The topic is as follows:

There is a single function calculator, which can only calculate the difference between any two integers and then take the absolute value. The operation process is as follows: enter the first integer x 1 and only display no operation; Then enter the integer x2, and then display the result of |x 1-x2|. For example, enter 1 2 in turn, and the output result is | 65438+. Every subsequent integer input is an operation of subtracting the previously displayed result and then taking the absolute value.

(1) If Xiaoming enters 3, 4 and 5 in turn, the final output result is _ _ _ _ _;

(2) If Xiao Ming randomly inputs integers from 20 1 to 201one by one, and the final result displayed after all inputs is set to m, then the maximum value of m is _ _ _ _ _ _ _ _ _;

(3) If Xiaoming randomly inputs n positive integers one by one from 1 to n(n≥3), the final result displayed after all inputs is set to m, and the minimum and maximum values of m are explored.

Look at 2011April, Volume B of the 16th China Cup Final (junior middle school group), question 12:

Let S 1=|x 1|, S2=|S 1-x 1|, …, Sn=|Sn- 1-xn|, and put 1, 2,3.

Obviously, Haidian's finale question evolved from the Chinese Cup question, and the second question is exactly the same as the original one. This question accounts for 6 points, and it is estimated that many children are stumped. My child only answered the first question correctly, and the last two questions were wrong, and 5 points were deducted.

From here, we can see some clues. Whether it is the mid-term and final exams of each semester, or the math finale of the senior high school entrance examination, there will be some difficult questions in the competition. If you don't practice at ordinary times, you will inevitably go crazy on the spot.

In addition, I heard that the learning difficulty of senior three will be greatly improved. If you are only used to doing simple conceptual problems in junior high school and rarely see difficult, abnormal and comprehensive problems, I am afraid you will not be able to adapt to the knowledge reserve and thinking ability for a while.

Also, although our children were no longer eligible for the first prize of the provincial discipline competition when they took the college entrance examination, judging from the situation of independent enrollment in colleges and universities in recent years, if you want to go to a prestigious school like Beiqing, if you don't get extra points for independent enrollment, it is extremely risky to enter the exam. However, if there is a lack of subject competition, it may not be available.

In a word, participating in academic competitions will help children to deepen their understanding and mastery of what they have learned, and help to enhance their own strength and self-confidence. In fact, the so-called college entrance examination and the so-called competition are just large-scale upgrade games that consider children's IQ and endurance. Why not let children actively participate in the game with a game mentality? As long as you have a correct attitude and practice more games, you can not only broaden your horizons and verify your strength, but also bring some challenges to some boring daily studies and increase your interest and fun in learning. It should be the best policy for those children who have spare capacity for learning.