The knowledge of the first and second grades is not important. Real knowledge starts from grade three. You can borrow math books from your relatives and friends for grades three to six, and then read each page carefully from the first page. Try to do the above questions, ask others to help correct them, and search for the corresponding final papers online after learning each book. Or you can directly search the final exam paper, and search the internet for knowledge you don't understand and ask relatives and friends. Elementary school mathematics is very simple. As long as you study hard, you will certainly understand it. Besides, the landlord 14 years old, your understanding ability should be good, I wish the landlord success and academic success!

Hope to adopt ~