That's because the question you asked is not deep enough. Many problems in life can be transformed into mathematical problems. Some are just simple math problems. If he is interested in something, you can set some obstacles (which can be solved by mathematics) from what he is interested in. Then he will get used to using math. Homework is not much expensive. I suggest you bring his homework, and you add a question mark to every step of his problem solving. Let him solve these question marks you gave him again, so that he can go deeper, or he will find that his homework is useless. I didn't do my homework for six years in primary school, so I got the first place in the exam. The reason is that I have to study math problems more deeply and put more question marks, which is very useful. I hope it helps you.