Moby loves mathematics and pays attention to cultivating children's mathematical thinking and problem-solving ability. He guides children to learn while playing through vivid and interesting stories and games. Moby's love of mathematics covers the basic knowledge of mathematics such as counting, comparing size, time and space. , but also pay attention to cultivate children's logical thinking and reasoning ability.

The "Fourth Five-Year Plan" fast calculation focuses on cultivating children's computing ability and mathematical operation skills, and helps children master basic operations such as addition, subtraction, multiplication and division through a large number of exercises and topics. The content of "4-5" quick calculation is relatively basic, and it is suitable for children who are younger or just beginning to contact mathematics.