My personal understanding is that the knowledge point of "understanding" will not be taken out separately, but will often appear as a step of answering questions. If you ignore a knowledge point, even if you are familiar with other knowledge points, you may not be able to do a big problem well.

Mathematics needs to learn every knowledge point well, and every knowledge point is intertwined to form a knowledge network. For example, the definition of continuity is based on the definition of limit, the derivative is based on continuity, and then extended to multiple differentiability.

Finally, there is no shortcut to the math exam, and diligent practice brings high scores.