About Substractions
Characteristics:
- Learning the subtractions
- Play against the clock
- Play a duel against another player
- Exercises of subtractions with numbers from 1 to 4 digits
- Beginner, intermediate, advanced and expert levels
- Learning the subtractions
- Play against the clock
- Play a duel against another player
- Exercises of subtractions with numbers from 1 to 4 digits
- Beginner, intermediate, advanced and expert levels