The electronic version of mathematics textbooks can be purchased in pdf version, and can also be searched by major engines through the following channels:

1. The electronic version of the PEP mathematics textbook can be searched on the search engine to the electronic textbook network, which contains the electronic version of the primary school mathematics textbook.

2. Other non-human education versions can search the corresponding versions of electronic textbooks.

3. Enter the electronic version of primary school mathematics teaching in WeChat search, and you can also directly find the electronic version of mathematics textbooks of all grades in PEP.