| Adding | Subtracting |
|---|---|
|
1+1=?
2
|
2-1=?
1
|
|
3+3=?
6
|
6-3=?
3
|
|
6+6=?
12
|
10-2=?
8
|
|
6+7=?
13
|
2+6=?
8
|
|
20+3=?
23
|
9+1=?
10
|
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