数学之美
4.2 (
912 ratings )
Стиль життя
Ігри
Перегони
Розваги
Навчальні
Головоломки
Розробник: Changjie Yan
0.99 USD
Often arithmetic has a strong effect on the intelligence of a person.;
Essential artifact for brain workers.
------------------------------------------
Introduction:
1 timing arithmetic calculation, on one digit or number is calculated
2 time to answer each question
3 answer hints