Yes, it depends on your personal thinking ability. If you have a good foundation before, you can draw inferences and think backwards every time you do a problem. If you treat math like a gobbledygook, I suggest you recite more, do more and ask more questions. Mathematics in junior high school is nothing more than geometric algebra, and everything can't be separated from it. Algebra can solve algebra problems in basic junior high schools by reasoning all the formulas once and then deducing them backwards.