Arithmetic app is very useful to training your brain.
There are 4 levels, and you can choose any level and play.
When play, Just choose the correct answer. However if you want to train brain effectively, then try to find the correct answer more fast.
But don’t worry. If you play much, your calculation speed will be improved much.
You can challenge “Hardest” Level if you play several times.
You can be a top of the Arithmetic.