1, guide the child to think more, let her say what she thinks, and then correct it for her.
2. Be patient when explaining. If parents have no patience, don't talk about children having patience to listen to your explanation.
You can put some similar questions together and let her do the same type of questions one after another. She won't do the first question. You guide her and explain to her, and then she can do better in the second question. The third question may be completely finished. The latter right is familiarity and practice. It is estimated that she will basically do it in the future.
Mathematics is an abstract thing. From the real world to the abstract world, children often can't think of it and can't accept it. You can give some examples in life to help children understand.
Your adoption will be my motivation.