I have two children myself, and I often tutor them both in their studies, and now one is in the first year of junior high school, and the other is in the third year of junior high school, and the grades in the last semester are the first in the class, so I should have a certain right to speak, and I have obtained a teaching certificate.
First of all, mathematics is one of the subjects that is easier to get scored. Parents don't have to worry, as long as the method is correct, improving grades is fast. Babies in the third grade need more concrete thinking, so when children have a lot of questions they don't understand, they can try to concretize them. 
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Add**Annotation, no more than 140 words (optional) Take the score as an example, you can take out the physical object, such as cake, apple, pumpkin, chocolate, you can cut it according to the topic. For example, a piece of chocolate, Xiaodong ate 1 8, Xiaohong ate 3 8, how many fractions did the two eat in total? Take out the real chocolates, divide them according to the topic, and finally ask the two of them how much they have eaten. This is more intuitive, concrete, and easy for children to understand. The following ** is more intuitive. 
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Cutting winter melon, adding and subtracting points is taught to children in this way of dividing objects, and after becoming proficient, children will establish abstract thinking. Not only that, but you can also consciously ask your children to share something with their family or younger brothers and sisters. In this way, let the child understand that if he scores math well, he will not suffer. This will build up a strong desire to learn – because it is really useful to learn good grades. In primary school, some children's abstract thinking has not yet been established, so try to use concrete things to make children understand. Second, in the process of children's problem-solving, if they encounter knowledge points that they have not mastered, they should stop and look up in the book. Because what is written in the book is the most detailed and intuitive. Let the child draw the key words in the main points and keep them in mind. Then go back to what you're doing. Do the questions Check the knowledge points in the book and do the questions again. Following such a procedure, this knowledge point will be mastered slowly. The content of mathematics learning in each semester is nothing more than those few knowledge points. After mastering each knowledge point, the child is naturally not afraid to do the questions. Third, the most common mistake that many unprofessional parents make is to answer as soon as their children ask. The scientific method is to use the "Socratic question-and-answer method". When your child is confronted with a problem, don't answer him right away, but ask him instead, "What do you think?" Tell your child, "Mommy is thinking too, and you are thinking about ......."The goal is to develop the habit of deep thinking. And telling the child the answer directly, the biggest harm is to make the child's thinking stay at a shallow level. Fourth, when the child's homework burden is not heavy, let the child build his own problem book. The wrong question book is the place where you "step on the pit". When you have free time, or before the exam, take out the error book and review it. The above methods, carefully implemented, children's grades are easy to improve! Parents should be patient, raise their children like flowers, cultivate them carefully, and they will be able to become talents. I hope my output can help you a little bit! Your attention and likes are the greatest support for me. Thank you for your attention to "Teacher Luo's Broken Thoughts".