The mastery of knowledge points is not particularly strong, or the understanding is not very thorough.
Your son has a strong understanding of mathematics, and most of them are analyzed by your parents.
Therefore, he relies more on your tips and will not know where to start when solving his own problems.
My advice to you is:
See him solve the problem, but don't give any hints to determine whether he is the phenomenon I mentioned above.
If so, parents are advised to listen to his ideas when he solves the problem and see what knowledge points he will miss, and then strengthen it. By asking him to get the conditions given by a topic every time he reads it, he will focus on cultivating his problem-solving ability. It is very important to give children this idea. ) focus on cultivating his ability to comprehensively examine questions.
If not, it is mostly because the child is careless. The suggested method is: let children not do oral calculations or mental calculations, but develop the habit of calculating on paper. So it is not easy to make mistakes.
In addition, my advice to you: don't unilaterally pursue things like the current ranking. Ability is the main thing. Only by mastering all the knowledge points and leaving no dead ends can we play well in the end!
I hope my answer can help you!
I hope your children can learn something by going up a storey still higher!