Wisdom math is good, because it is not made up casually. Each chapter is a supplement to the compulsory education textbook, which is not very deep, but it is completely acceptable for children, so it is necessary to buy it.

Wisdom Mathematics is a textbook used in mathematics activities in Shanghai Mingzhu Primary School. The textbook of thinking training (or Olympic Mathematics) compiled by Mingzhu Primary School is less difficult than the courses of specialized institutions, and is suitable for use as an introduction.