数学之美
4.2 (
912 ratings )
Životní styl
Hry
Racing
Zábava
Educational
Puzzle
Vývojář: Changjie Yan
0.99 USD
Often arithmetic has a strong effect on the intelligence of a person.;
Essential artifact for brain workers.
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Introduction:
1 timing arithmetic calculation, on one digit or number is calculated
2 time to answer each question
3 answer hints