Just let her do more questions. We also recite the addition and subtraction in 10 minutes, but the baby will recite it faster. In fact, counting his fingers is to help him remember. It doesn't matter if he is slow. Help him improve his interest in other ways, such as telling stories. Maybe this story needs to do some math problems, such as playing a game with her and arithmetic. If you practice these things more, you will naturally get better.