Arithmetic Exercise app analytics for August 21

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.