Now with greater or lesser comparison exercises

General Report of the practices
Date and time of the last practice performed

Learn progressively by practicing every day

From the most basic level ...
It consists of three levels per operation.
The first level with single-digit operations.
The second level with three-digit operations but still simple.
The third level with three-digit operations but a little more complicated ... For the sum with operations carrying and for the subtraction with operations lending

It also provides information on each practice:
 - Number of successes and mistakes
 - Shows errors and corrections
 - It also shows a rating that goes from 0 to 20