Is it possible to teach yourself all the math in Grade Two in 30 days? How to learn?
If you are good at math, you can. Read books in a planned way, think about textbook exercises and find tips. If you are not at ease, do some exercises. My experience. Without a good foundation, it will be difficult. Spend more time mastering the rules and skills, be ashamed to ask questions, sum up experience and master problems. Don't be impatient, step by step, to help digest knowledge.