Cultivate interest

Do some simple exercises for children first, cultivate their confidence in mathematics first, and eliminate their fears.

Find a good friend

Find a good friend for your child, who is good at math, preferably the opposite sex, or sit at the same table (you can talk to the teacher), and eliminate the weakness that children are too ignorant to ask the teacher (say hello to friends).

Communicate with the teacher

Talk to the math teacher and hope that the teacher will encourage the children more and blame them less (this is very important, I personally feel).

Do the wrong exercise book

Give the child a wrong problem book, and educate the child to copy down the wrong problems in the wrong problem book when he makes mistakes in mathematics, and then solve them in the way he already knows.