Arithmetic Exercise

This is an app suitable for kindergartens and elementary school students to learn mathematics and arithmetic exercises.
The main function:
- Addition, subtraction, multiplication and division of any number range (0~9999).
- Mixed calculations for each grade designed according to the outline.
- Enhance your arithmetic skills based on historically recommended questions.
- Draft calculus.

Letting children improve their mathematics ability in entertainment is a good helper for children to learn mathematics.