It is more appropriate to draw inferences from one point, but it is more difficult to do. Children's learning is easier to master, and it is solid, and there are many cheaters.

Cheats of learning and thinking: it is true that textbooks come from learning, but they are not necessarily spoken in class. It should be said that it is also relatively systematic, and it is also mixed with some anime images, which is relatively not boring. It's as difficult as Gauss.

In other words, it used to be a good textbook, but now there are comments on the Jianghu that it is a bit old and outdated, but the basic questions are still relatively solid. There are basically no problem-solving skills and animation tidbits, just telling the topic honestly. The difficulty coefficient is lower than the cheats. You can choose according to your child's situation.