Addition Facts

Learn thoroughly and efficiently with Elon.io

Elon.io uses a spaced repetition system such that you won't forget anything.
Elon.io clearly explains grammar thoroughly the moment you start using it.
Elon.io lets you create your own word lists, to rehearse your own words.
Elon.io is entirely free.
To start, click on lesson 1 below.

1. 0+

2. 1+

3. 2+

4. 3+

5. 4+

6. 5+

7. 6+

8. 7+

9. 8+

10. 9+

11. 10+