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0 + 0 = 0
0 + 1 = 1
...
2 + 0 = 2
2 + 1 = 3
2 + 2 = 4

Select or download this
```
 
0 + 2 = 2
1 + 1 = 2
2 + 0 = 2
```
Select or download this
```
0 + 1 = 1
0 + 2 = 2
1 + 2 = 3
```