To tell the truth, in the second grade of primary school, this grade was not very high, but it was ok (my brother got full marks in English and 99 in mathematics in the third grade). Of course, I don't think my brother is very clever, but he is studying steadily at present. I can tell you responsibly that the grades of primary schools are very different from those of junior high schools and senior high schools, and many people will fall down because of mathematics. Mathematics is step by step. Elementary school only needs the ability of calculation, junior high school needs the ability of spatial thinking (those who lack this ability will lose), and senior high school needs the ability of logical reasoning (those who lack this ability will lose). In order to ensure that your children will be among the best in mathematics in the future (what's wrong with primary school mathematics now), pay attention to the cultivation of children in other aspects. Sudoku, large puzzles, Rubik's cube, etc. )

Hope to adopt! !