KeisanCard в Android Market

KeisanCard (v. 1.2.1) Разработано lilyspringhorse

This is a calculation training application for early elementary school years,
a time trial of simple calculations composed of single digits:
Add(no carry/with carry), subtract(no carry/with carry), multiply(1x/2x/.../9x) and divide.
Calculation time records and numbers of miscalculations are stored in personal databases, and you can check the records and miscalculations later.