Chemistry and mathematics mainly recite formulas. Generally speaking, science is mainly about writing more exercises. Write more exercises, and the formula will naturally be engraved in your mind.

English is more about grammar and memorizing words, or more about writing and practicing grammar. If you can't read the words, look them up in the dictionary or ask your classmates and teachers.

Some problems in mathematics don't have to be thought according to what he said, but they can also be thought in reverse, that is, reverse thinking. There are also some basic knowledge that may be applicable to high school and below.