Recommend extracurricular reading materials about mathematics in the second grade of primary school?

Recommendation of extracurricular reading materials about mathematics in the second grade of primary school;

1, Math Help (all 25 volumes)

Rosa Sandas Xin Lei Publishing House (USA)

2. "Oh, my God! Mathematics can be learned like this. "

(Japan) Tetsuo Noguchi Shaanxi Normal University Press

3. The wonderful kingdom of numbers

Li Yupei China Children Publishing House

4. Li Yupei Mathematics Fairy Tales Collection (lower grade of primary school)

Li Yupei Dolphin Publishing House

5. Ma Xiaotiao Plays Mathematics (Junior Grade)

Yangjinlin Art Publishing House

6. Wonderful Mathematics (Senior One and Senior Two)

Boer Chongqing publishing house

7. My favorite interesting math book (1 Grade 2)

Xinghe electronic industry press

8. Mathematics is wonderful (grade 1-2)

Liu Yong Electronic Industry Press