pupils mental arithmetic - fourth semester

Description
This math app is designed for pupils who are in the fourth semester or in age group 6-8.
pupils can easily do the mental arithmetic exercises to improve their ability of arithmetic. 

How pupils can benefit?
- Pupils can do a mental arithmetic exercise every day,which is designed from easy to difficult ladder
- After pupils choose an answer, the App can tell you the answer is right or wrong

Features
- Easy to use interface which pupils can understand
- 90 levels with 10 - 20 questions in every level
- All levels available free
- Just right for pupils who are in the first semester or in age group 6-8